White bass are like a group of teenage boys. They will do anything and don't stay in one place very long. When active they will hit like their black cousins will hit anything that moves. There are no right or wrong baits just baits that work at different depths. I have caught them on stuff as small as 1/80 oz and as large as Zara Spooks.
Good baits to have along are: jigging spoons in a couple of sizes, bucktail jigs in several sizes and colors, grubs with several sizes of jig heads as well as a few inline spinners and some lipless cranks.
White, chartreuse and silver are standard colors but anything under the rainbow will work on some days.
When you refer to the James and your motor, anything goes below Springfield lake if the water is deep enough for you to run. I have been to Galena with a 225 when the water was up.