Vonreed's 20 is about 4 times my lifetime total on BSL. So with a grain of salt, I agree they tend to feed on bottom. I would imagine any natural bait like worms, minnows, crawfish, maggies would be readily bitten by YP.
I think they are fairly aggressive little guys, but seem to be widely scattered through out the lake. The best intell seems to be on y'alls end of the lake, but I talked to a diver that claims to have seen LARGE schools of them in Sister Creek and I know of them coming Theodosia area and Oakland and Big Creek and Sugarloaf and and and.
I'd to bet a dollar that I could catch one on any given day though.