I would recommend that you not waste your time in Sam Houston Natl. Forest. You would be better served finding someone who is MLD that will allow you to take some does. I know a place that only charges $150 for a doe, and they are covered up in them.. You can almost close your eyes and point your rifle away from you and kill one. Not much sport in it, but if you want meat for the freezer, it's almost guaranteed to get one.
I've been hunting Sam for 9 years now and have not seen a legal buck deer during legal hunting hours, during deer season in that time. I've seen lots of does, but you have to have a doe tag to kill them during rifle season. I've seen lots of bucks that DO NOT meet antler requirements.. But NO LEGAL bucks in 9 years now. I know they exist, but I think they are just too smart to be shot during legal shooting hours. And if you think you are going to "hunt the rut"-you already missed it. My game cameras show end of August, beginning of September, was prime "rut" time for Sam. The scrapes on my frequent trails are all getting covered in leaves and have not been checked/urinated in for a while now.
Your best bet might be to find guided hunts and/or try high fence ranches. Sure makes hunting a lot more fun when you are seeing a lot of game.
A hog is nothing more than a bullet receptacle.