Ok everyone, I am a new pop-up Camper owner. I camp 90% of the time at my lake lot in central IL that is completely shaded. My pop-up is probably 100ft from where we have our Generator set up. I want to add air for those really hot days. My Pup doesn't have air now but does have a roof vent and says it is wired for A/C. After reading all of the posts on this site I'm worried about the weight of the A/C damaging my roof and I'm conserned about that far of a run from my generator. I think I have a lead on both a used rooftop unit and a used portable a/c. Both for about $200. I'm sure the rooftop would cool better, but I would have to install it and worried about long extention cord run. Portable would have less draw, easier on my roof and no chance of me messing something up on install. Not sure it would cool enough. I have a small Pup (10' box). Need advice.