Actually there are lots of good reasons to dive here. We used to use our SCUBA for noodling, plus we spear fished a lot on Tennkiller. There's a dive park on the lake that has a sunken school bus, plane and helicopter you can swim through and around as well.
I've dove Beaver some too. Nice lake with great visibility. Found out the first time that a 3/2 suit isnt a great idea though. First thermocline and it gets pretty chilly even in the middle of summer. I'd take a 7mil for sure.
The island Dennis mentioned is ok to dive around too, but there rally isn't much there. Plus the last time I dove it my boat got pretty chewed up from being pushed up on the rocky bank.
Speaking of boating it.....
It's a big empty feeling in your stomach when you take off across that lake and look down at the depth finder and see 235ft!
