Nope, not too active around here this time of year.
Beaver Lake is just on the other side of Rogers, Arkansas. Probably two or two and half hours from Tulsa, IIRC. Nice little dive site just on the south side of the dam off 187 (
maps.google.com link) with a good shore entry, parking, etc. And there are nicer dive sites through the flooded forests off the loop of Indian Creek road just to the north when you are ready. Tow a dive flag because of boat traffic. (Good advice for any lake diving within driving distance of where you are, BTW.)
C&J Sports is just south of the dam and has reasonable air fills (though they don't do nitrox).
The last handful of years the DUI drysuit people held their DOG (drysuit owner's group) rally at that site, I see that they've moved it this year to Table Rock at the Dewey Short Dam Site on April 25th-26th (weekend after next). Here's a link to their
flyer. A fun chance to get someone to show you what drysuits are all about, and a way to meet other local divers even if you aren't interested in buying a drysuit at this time (or aren't interested in the DUI stuff).
Highly recommended for new divers, IMO. You'll get a mini-class on drysuits and do a little tour with an instructor or divemaster. If you go, be sure to
arrive early.
Finally, I know some people from OK hang out at
MidwestMuckDiving.com which might be another way to meet local divers.
Good luck!
John_B