I've seen quite a few comments on here and elsewhere from people who claim solar is too expensive and say "I'll just run my generator! - I can buy a lot of fuel and beer for the cost of solar!". Those people have their minds made up and aren't going to be easily swayed to change their travel style or invest in another means of energy.
We were at RMNP and the lady next to us came over upset that we reported them for running their generator all night. Which is funny, because we didn't, but we sure complained amongst ourselves about it. She said her husband had a medical condition. Yeah - sure - that CPAP couldn't be run by any other means? We've been known to hand the odd neighbor an extension cord, on at least a couple occasions if we strike up conversation with them and generators come up.
When I go camping it's with a backpack and bivy or tent. Staying in an RV is not the same as camping for me, and comes with a different set of expectations. For a lot of people, including myself, that includes an expectation that all the systems you've paid for are functional to some degree. A lot of people are full-timing out there and live differently - day to day in an RV - than you do. It's not vacation for them, it's life. I'm not saying that justifies generator use in close quarters, or at all, just that not everyone is considering their stay out there the same as you. Thankfully, those people seem more likely to invest in solar than the occasional weekender.