My buddy AR wouldn't bother hunting in the thick patches in the riverbottoms. He'd look for clearings & roads carved into them or stay to the outside. His primary reasons were snakes: either cottonmouths or moccasins (maybe both?). Said he went through them once in his first couple seasons and never wanted to do that again. When I went out with him years ago, I thought it best to heed his warning & stay out of there. Depending on where you are in TX, I'd suspect you may have similar issues.
Deer are typically edge creatures, like us. We like transition zones. They have to come out sometime. Unless you have a brush hog, you may just want to spend some time scouting the perimeter for game trails in/out.