Generators...What do you use at the track?
When we camp out at the track, or anywhere for that matter, I run a 3000 watt Honda. It's quiet, runs a long time on a tank. It's not on wheels, but is light enough to carry around, especially if you have two people.
Pricey though.
This is the one I have:
http://www.hayesequipment.com/em3000c.htm