Bring a table and lots of other stuff
The last time I was there I *did* need a loading table to clean guns on as I was told they didn't want you doing that on the concrete benches. Phoenix can be brutal, like Raton without the shelter to get out of the elements. I've had luck taking a big 10 x 20 tarp, wood slat material, C clamps, bungie cords, and stakes. It's hard to get a tarp to stay put while attached to the canopy with just spring loaded clamps. I lay the tarp edge over the metal lip of that canopy, lay the slat on top and C clamp it down in about 4 places. Then I use bungie cords and stakes on the other end to allow a little give when the wind starts blowing 317 mph. It can be nice, it can be brutal, over 3-5 days down there, you'll probably see both, and you'll be in good company.
I've seen guys rent trucks down there to load in which is a great idea, except you probably need some lights to see. Seen shredded up tents too. Man, reviewing this is making me want to rent a professional tent like Lester's or have a hole dug and put in one of those do-it-yourself tornado shelters like I've seen sold in Oklahoma.
The crew sure does their best down there under sometimes unbelievable conditions. Don't let it scare you away, just come prepared and be ready to tell stories years later, "do you remember the '12 Cactus, never seen anything like it"? "That's nuthin', I was there for the '09 Cactus, it blew my underwear plum off and I had to drive to New Mexico to find them". And so the BR cycle of life goes...... Good luck....