That just depends on where you are wanting to fish. River end use pearsons, though there is a lot of drift wood at the bottom. Up around the dam, I use frances slocum or miami. Frances slocum does have some cracked concrete at the bottom of the ramp that should be about where you trailer wheels would end up. Is dead center of the ramp.
As for fishing for crappie it kinda depends on which end of the lake you want to fish. River/somerset side probably holds more fish right now than anywhere, but you can catch them on most of the lake.