When you are wearing the suit in the first picture, the jute hangs down and actually covers more area than one would expect. I actually cut the netting so that it isn't just on the back of the BDU. Picture laying the BDU facing down, back facing up. When you attach netting on the arms, on just the back side, you won't get quality coverage. I actually have excess netting that I let hang around until after the glue dries on the netting on the backside of arms. Then the excess netting is pulled reasonably tight over the top of the arm to the other side. While the whole arm is not covered, it is just enough to allow for great coverage in prone as well as when stalking. I wish I had a pic on me that shows this, but hopefully this gives you an idea of what I do. Cause it sounds a lot like what you are going for.
As for the battle belt, leave the bottom portion like in the last pic without netting. Whill make it easy to wear but even with jute/netting it is still comfortable.
As for uppper chest coverage, I wish I had pics of it from both sides, but if you want more upper chest coverage, just add a bit more netting. You can always add to it, so just mess around with it a bit and you should be fine.
I just arrived in Texas a little while ago, and have yet to play any games down here. While I did not make any of the suits above specifically for a Texas environment, any tan based suit should suffice. Tan based work in all environments with the right vegetation.
I have a thread in the concealment section, called Making a Ghilie Suit. It is an old thread, but it offers a few tips to help you get things underway.