You can pretty much use any floatation with a shrimp/shrimptail.

I mainly use a "rag" or aerofly type setup, with a shrimp tail attached with the egg loop in the leader/hook.

Going with straight bait, and no floatation, is something I normally only do during very low flows and clear water. You'll snag a lot less and keep more gear if you use a corky or rag.

Good Luck!