Really depends on the water temp. Honestly, since the shore fishing bite gets so good using crappie rigs pre-spawn and casting F9’s, F11’s, and paddletails during the spawn, we don’t take the boat out to FC very often in the spring. The shore fishing bite along the rocks is one of the best 1-2 week stretch of fishing a guy can have in SD, and it usually happens on FC about a week or two before the same type of bite starts going in eastern SD for wader fishing.
When we do fish from the boat, we usually run cranks, either over shallow flats or leadcore in 25-35′, just depends on the water temp, and weather. Lots of guys will vertical jig, but I often wonder if that’s because that’s all they know how to do. If the sun is shining, fan casting a paddle tail & jig up shallow can be productive, but you’ll get your share of white bass and smallmouth as well.