Sounds like a fine time to fish the Snake, although June-August seems like the prime time, you aren't too far off.
Submersible lights, hmmm, not sure if that is exactly legal considering it could possibly be considered chumming, but I could be wrong, also just a thought. I would think of it as a good idea, considering light attract bugs/larvae>baitfish>predator fish, Crappie are usually found under houseboats/docks and the Catfish can even be caught on Crankbaits/Jigs, out of the 15-20 Channel Cats I have caught out of the Snake, maybe 3 were caught on bait.