My wife Kay and I bought a slightly used Grand Surveyor GS280 on Ebay last December. It was in Montgomery AL and we live in Louisiana. Our first night of camping was on the trip home. We had to setup after dark, chilly night, no propane, no flashlight, not enough blankets and of course no experience. Almost took a corner of the roof off the check in station. The very kind attendant gave us the last pull through and loaned us a flashlight, electric heater and more blankets. We (that includes me, wife and 6 yr.old daughter) decided to all sleep on the fold down sofa close to the heater. I'm 6'3" and got the widow position. There is no insulation below that sofa and the cold air comes right up the opening behind the laid out bed And my daughter pulled all the cover off on her side. I didn't have room to turn over and my feet were hanging off, or up on the shelf really.
Well, that was the first night. Things have improved.
There is more info about us on my reply on Surveyor heading.