The text does not mention creeks or brooks, only rivers; just as it does not mention lakes only seas.
“Rivers” (plural) are mentioned in the text in two places, one in the Land Northward, and the other in the Land of Cumorah. What those two lands had in common was the Sea North (Ripliancum), on their north. And that is the direction the rivers flowed as can still be seen today, particularly the Olcott River and the Oak Orchard River located between Rochester and Buffalo New York, which were large enough for boats to carry timber.
2 And there was no contention among the people in the forty and fourth year; neither was there much contention in the forty and fifth year.
3 And it came to pass in the forty and sixth, yea, there was much contention and many dissensions; in the which there were an exceedingly great many who departed out of the land of Zarahemla, and went forth unto the land northward to inherit the land.
4 And they did travel to an exceedingly great distance, insomuch that they came to large bodies of water and many rivers.
5 Yea, and even they did spread forth into all parts of the land, into whatever parts it had not been rendered desolate and without timber, because of the many inhabitants who had before inherited the land.
6 And now no part of the land was desolate, save it were for timber; but because of the greatness of the destruction of the people who had before inhabited the land it was called desolate.
7 And there being but little timber upon the face of the land, nevertheless the people who went forth became exceedingly expert in the working of cement; therefore they did build houses of cement, in the which they did dwell.
8 And it came to pass that they did multiply and spread, and did go forth from the land southward to the land northward, and did spread insomuch that they began to cover the face of the whole earth, from the sea south to the sea north, from the sea west to the sea east.
9 And the people who were in the land northward did dwell in tents, and in houses of cement, and they did suffer whatsoever tree should spring up upon the face of the land that it should grow up, that in time they might have timber to build their houses, yea, their cities, and their temples, and their synagogues, and their sanctuaries, and all manner of their buildings.
10 And it came to pass as timber was exceedingly scarce in the land northward, they did send forth much by the way of shipping.
11 And thus they did enable the people in the land northward that they might build many cities, both of wood and of cement.
12 And it came to pass that there were many of the people of Ammon, who were Lamanites by birth, did also go forth into this land.
13 And now there are many records kept of the proceedings of this people, by many of this people, which are particular and very large, concerning them.
14 But behold, a hundredth part of the proceedings of this people, yea, the account of the Lamanites and of the Nephites, and their wars, and contentions, and dissensions, and their preaching, and their prophecies, and their shipping and their building of ships, and their building of temples, and of synagogues and their sanctuaries, and their righteousness, and their wickedness, and their murders, and their robbings, and their plundering, and all manner of abominations and whoredoms, cannot be contained in this work.
15 But behold, there are many books and many records of every kind, and they have been kept chiefly by the Nephites.
16 And they have been handed down from one generation to another by the Nephites, even until they have fallen into transgression and have been murdered, plundered, and hunted, and driven forth, and slain, and scattered upon the face of the earth, and mixed with the Lamanites until they are no more called the Nephites, becoming wicked, and wild, and ferocious, yea, even becoming Lamanites.
17 And now I return again to mine account; therefore, what I have spoken had passed after there had been great contentions, and disturbances, and wars, and dissensions, among the people of Nephi. (Helaman 3)
In the Land of Cumorah, east of Rochester is Irondequoit Bay, which extends inland currently 4 miles (.5 miles wide, 70 ft deep) and has a tributary (Irondequoit Creek) extending it eastward to Palmyra. It then merges with Red Creek, then Ganargua Creek (at Lyons), then Clyde River (at Clyde), where it meets Sodus Creek heading northward to Sodus Bay which is a definite candidate for Ablom, an eastern seashore.
4 And it came to pass that we did march forth to the land of Cumorah, and we did pitch our tents around about the hill Cumorah; and it was in a land of many waters, rivers, and fountains; and here we had hope to gain advantage over the Lamanites. (Mormon 6)
3 And the Lord warned Omer in a dream that he should depart out of the land; wherefore Omer departed out of the land with his family, and traveled many days, and came over and passed by the hill of Shim, and came over by the place [not Hill Cumorah] where the Nephites were destroyed, and from thence eastward, and came to a place which was called Ablom, by the seashore, and there he pitched his tent, and also his sons and his daughters, and all his household, save it were Jared and his family. (Ether 9)
The location of First Creek would have been tucked safely back a distance from the bay, on the raised bank with a southerly view to watch for anyone coming from the south and to catch fish (especially during the spawning season) where the creek entered the bay.
“Fishing on the open water for trout and salmon starts in Sodus Bay the first of April. At the beginning of the year, the fish are in very shallow water. Fish will be concentrated in the warmest water they can find. They are just becoming active and chasing the bait that is congregating there. As a rule, we are looking for the warmest water possible. Warm water is found at the mouth of any stream or bay flowing out into the lake.” (https://www.fishsodusbay.com/fishing-seasons-techniques/april-may-fishing/).
“Fishing this time of year focused on trout and salmon in the tributaries.” (http://www.fishsodusbay.com/fishing-seasons-techniques/october-march-fishing/)