Just a couple of comments...
Regarding lures, sounds like you have the usual suspects covered...if the water is murky, or if the water is too warm, Power Bait will likely be your best bet for trout. I never spend too much time with one lure; if they ain't biting, try something else.
As far as float tubes go...I know next to nothing about float tubes, but I've always thought it would be a great method for fishing all the illegal spots up here in the Bay Area. I know a couple of reservoirs where you could absolutely slay the bass if fishing were legal! Store-bought goldfish make surefire bass bait, but they are always illegal as hell, so you didn't hear it here.
Oh, back to the trout...if you can ever find natural baits on-site such as grasshoppers or worms, use those, and hold on to your float tube!
Since float tubes and related gear are marketed primarily to fly fishers, it seems like they would be rather expensive, like way over $100. But look around used, and you're bound to get lucky.