That’s an easy one Nevada you can dive Tahoe, Powell and Mohave while staying at Reno, Las Vegas and Laughlin.
I’ve been to Laughlin and dove Mohave a few times with friends. There is shore diving at Cabinsite Point with a submerged school bus, Van and skeleton that points to a buoyancy course. On the other side of the point are a couple of small boat wrecks. Visibility is usually above 50’ and often more than that.
Tahoe is a deep lake that stays cold it is more technical dive being it is at altitude. I have not dove it myself so I’d look for more info before an attempt.
I can’t comment on Powell as I’ve never even been their.