What area in Texas? I've been doing well in the hill country with one nice bird, but south Texas has been fantastic. I've taken 2 down here and have helped clients get 3 so far. The gobbling action is starting to wayne a little bit though, I think it peaked about a week ago. You should still do well, especially if you are going with someone who knows what they are doing and knows the area well. As far as gear goes, I would stick with the minimalist aproach. It doesnt take much more than a few calls (locator, diaphragm, and friction) and a hen and jake decoy to have success. My best piece of advice is to drive your guide crazy. Pick his brain so much he gets tired of the questions. I wish I had a resource like that when I was learning. Not that many people down in south Texas really get into turkey hunting; too much focus on deer.
Good luck! Hope you break a beak or two!