Get a quality tarp, have two stakes on each corner pole, wind WILL come up, be prepared. Keep your ammo out of the sun, use plenty of sun screen. P. dogs see white a lot better than neutral colors. Take plenty of bug repellant that has DEET in it, yellow flies and deer flies may eat you alive if you are near water. Put up a larger tarp then you think you may need. Figure out a way to cool your barrels as they DO NOT air cool at 90*+ heat.
Take a look at Rick in Oregon's tarp, that is a kite, nothing to hold it down in 10 mph wind. Your poles need to be staked down to the ground with two ropes on each pole, 8 tie downs total. We put a third grommet in the middle instead of each corner to add extra support where needed with an extra pole.
See itchyTF's poles, the adjusters on the ropes are critical as wind comes up, You need two of these on each corner..
If your tarp gets to flapping, it will tear the groments where the pole attaches, then tear a huge hole in it. Keep your tarp tight. Extra gromets that you can repair a tarp with comes in handy, along with tool to do so.
Without a tarp, you are on slow cook, your ammo will have pressure spikes from being hot in the sun. Spend money on a great tarp, not bargain basement. We had several tarps tear up on us, basically the trip was no where near as enjoyable as we could only take so much sun. Spend as much money on a tarp as you do your shooting bench.
Don't forget a barrel cooling system of some kind, also a mirage shield on your gun barrel helps tremendously, cardboard with velco works very well.
I took several guys with us and they took their rig, their tarp tore up from the wind, they ended shooting out of their truck seats.
