In a word? No. It's not very reasonable to try and power an AC unit directly with a solar panel...that, and when the sun went down you would not have A/C.
Be careful with the arrangement you come up with - setup and take down could get really time consuming and quickly become more burden than it's worth. Spend the extra few bucks on a tent that reduces setup time. I once attempted to use one of those tents that extends out the back of a vehicle until I realized what a useless burden that was to get everything situatated (on level ground). I go with the goal of having a 1 hour boat dissasemble and 30 minute camping dissasembly...which on a two day regatta usually puts me on the road by 4 or 5pm Sunday evening.
How much fuel would it take to idle the car engine all night with the A/C on?
The idea was to start with the fully charged ". . .115 amp/hour deep-cycle marine battery" mentioned in the camping article. And, install the solar panel on top of the pick-up camper. Rig up/down time would be minimal.
Also, I might be tempted to use the "bumper dumper" in the parking lot, but can't quite work out the geometry to use it at speed on the interstate. I think it would be hard to steer from that position. <img src="http://www.catsailor.com/forums/images/graemlins/ooo.gif" alt="" />
