Man, I guess I been leaving to much stuff behind!
I don't have a trailor so I get someone to drive the Cobra and I drive the "support" vehicle. Number ONE item: A canopy for shade! We set up a table, chairs, cold drinks, etc. The Van carries a full set of tools, tires, parts, the usual stuff.
Once I took a generator, TV and my PS2 with racing games (once). It was kind of fun, but there were SO many people in my pit area "playing games" I couldn't even sit down at my own table!
Ernie