I'm new on this forum also but have fished Lake Texoma plenty of times.
First thing I'd recommend, is DO NOT hire a guide there, every one I've met were extremely pushy and all about business, not fishing. They seem like all they want is your money. They'll put you on the lake with the intention of filling the boat and getting off the water as soon as they can. Very unprofessional.
Myself and some friends usually fish with any lure that looks like a threadfin shad, deep or shallow. Silver spoons for deep, and rattle traps for top water.
The stripers seem to stay in areas where the water goes from shallow to deep very quickly, like points and river beds.
April and May are probably the best months to fish, for the spawn.
Good luck buddy.