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?