I love throwing tubes in the spring. I usually fish them on a 1/4 oz bullet weight and drag it super slow on the bottom. Especially in the really cold water, I will sometimes have 3-5 minute casts. When it comes to the spawn a small weightless tube on a bed is really good. The slow fall drives the bass crazy. Also, you might try dropshotting a small tube or craw type plastic on beds. It may seem weird at first but works really well.