Welcome to the site Bernie! A chartreuse or yellow twister tail on a leadhead jig will catch fish on any body of water including the river.
If your headed to pool 4, especially if it’s your first time, you really can do no better than to check out Everts Resort on the Wisconsin side of the river. They can set you up with the more specialized baits used on the river, including what the latest hot colors are, as well as showing you on a map the location of the wingdams that are up near the dam.
Sorry if I sound like a commercial but in my HONEST opinion, for a $7 launch fee, the fishing info you’ll get there is literally up to the minute and worth much more. Here’s a link to their website if you care to take a look: Everts
Chris