Nope, not easy being green, especially on the pocket book! But it makes me feel better considering how much gas I burn getting somewhere and adds to my own enjoyment doing something I've already spent a lot of money on.
Most of our camping is at places people go to escape noise and the good sites at most of our State Parks or any US Forest Service campground rarely have electrical hookups so I really like the solar idea. I hate running our big generator so I even have a 2000w Honda I run when I need the 120v. It hardly burns any gas, is very quiet and easily hidden behind a hill, berm, or tree to cut down on the noise even more. Again, not easy, but when I'm sitting in that chair sipping a cold one, I want to hear birds, not motors. I'm sure the family in the tent next to us appreciates it also. I feel bad enough parking the monster next to them.
Here's a picture of the panels on my roof. Future panels will be in the middle between the current ones. Screwed and glued with 3m 5200 Marine adhesive.