I've been searching for a number of months for something that would prove reliable the few times I would need it. I ended up deciding this would be the best, moderately expensive, air compressor to throw in the back when heading out on the trails:
http://www.autoanything.com/suspension- ... 9A0A0.aspx
All the other options seemed pretty good, but only 1 or 2 others seemed worthy of a purchase. While shopping at Costco the other day, I ran across a compressor from Q Industries that I ultimately purchased. There is nothing on the net covering the specific model number, but it was about $50. Alligator clips for the battery, 16' air hose, etc. I'll se if I can remember to post some photos of it & maybe a mini review if I get the chance to use it.
While researching options, I came across this site:
http://www.parksoffroad.com/prodreview/ ... ormain.htm
Pretty good info on a few of the many options that are out there.