Erich I used a 5wt for a long time down there and had succuss but switched to a 6 and sometimes 8 down there at rocky river. I can't say the fish are any bigger but I caught alot more because of the size flies I could throw. But the biggest I've caught was on a #6 muddler worked slow as a topwater in a deep pool. About 19" it on a 6wt it was a blast. Mostly 12" and under lately. But the the bigger flys seems to attract the fish more..We should head down there sometime.