It can be surprisingly cold at night. Be prepared with extra blankets and warm jammies or a cold-rated sleeping bag.
It can get cold at night at Pyramid Lake in May, so bring layers to wear in the brisk to cold desert Spring nights.
Keep easy-to-steal/sell valuables locked up and out of sight.
If you are planning on sleeping in your vehicle, use a couple of reflective windshield shades to keep out the heat during the day: this makes for cooler sleeping and more privacy.
Bring a variety of rope in different sizes: twine, heavy nylon, lightweight poly, etc. Mark your structure's ropes and lines with flashers, xmas lights, or reflective ribbon so people wont trip over them.
Get colorful old flat (not fitted) sheets from the thrift store. These are great for all kinds of things, like creating shade and color in your camp. Tie each corner into a knot; then, run rope from the corner to tie the sheet up.
Bring something to cover the ends of your stakes and rebar: Tennis balls and stuffed animals make good protectors.