Thank you for all the input. We camped in Cades Cove with no electric, no nothing and the people next to us had a big F800 truck with the hugest RV I have ever seen. It had a pop out screen porch on the back of it!!!! Their generator was so noisy we couldn't hear ourselves talk from over a campfire during the day. They did not run it at night. I would NEVER want to do that to another camper. We wouldn't be using the generator at all anywhere we had electric,which is mostly state parks where we spend the most time camping. We would only use it where there was no other option and we were burning up. We are camping in Cosby and Cades Cove this summer in our current travel trailer and chose the non generator loops for this trip!!! Love the roof vent, positive pressure idea, thank you.