Visiting the U.S of A.

Hi guys, I am thinking of crossing the pond later this
year and was hoping to do some gliding while over there.
I am looking for a club or clubs near the following
places.

Broken Arrow, Oklahoma.
Bryan Texas.
Dublin Georgia.

When I flew in Tehachapi some years ago I managed to
have an instructor come along with me in the glider
as a safety pilot.
Why do i want a safety pilot I hear you ask.

I am 73 years old and although fit as the proverbial
fiddle I do not take unecessary risks.

Any Phone numbers,e mail addys and locations would
be most welcome.
Should have said that I am flying a cobra 15 at the
moment.

Thanks guys.