Second the rat in size 20-22(anything smaller is just crazy to tie on, hold, tie, you name it). Depending on how low, a sz 18 frenchie can be dynamite. Sooo, al's rat for when its a trickle in september, and frenchie for when its low, but not august low.
For smallies, I always fish a sz10-12 green hopper with rubber legs. Really like low and clear smallie fishing.