Harbor Freight, Craftsmen, SnapOn, Milwaukee and several others now offer 1/2" cordless impact guns capable of at least 220 ft*lbf. I have a Harbor Freight 19.2V model and it is probably the single best tool I bring with me to the track!

For air, I use a $20 tank from Walmart. If it runs out, I just take it over to the track air hose and refill it. Sat TV? Well, I just bring some videos and watch them on my 13" TV (unless the Packers or Bears are playing...). I do have a generator, but typically don't take it to the track because I haven't really needed it. However, if I can find a way to mount it to my open trailer, it may come with me more and I may find more uses for it.

------------------
Bill
Planet 6 Racing
bill (at) planet6racing (dot) com