New (to me) Lance 815 truck camper owner. Got a few q's

^If it makes you feel better, I got about 7 mpg on the last leg coming home yesterday with the camper and boat behind. 70+mph into a 30 mph head wind will doo that! Had to slow down to 65 for a while when the wind was starting to suck the front windows out of the truck!
On the upside, I burned out any carbon deposits that may have been lurking in the ole engine!