My wife and I just spent 66 days on the road in overnight temperatures down to 5 degrees F in our new Advanced RV. We traveled a total of 11,000 miles from coast to coast. We plugged into shore power a total of 7 times and that was before we realized why bother. We've pretty much proved we have a totally self-sustaining Class B. Average water replenishment (40 gal.) and dumping (26 grey/18 black) could easily stretch to 10 days. Comfort was always utmost in my mind and we have pretty good front and back zoning with our articulated beds in back and rotating seats with a computer desk up front. 24" TV can be watched from either zone, however, we rarely watch TV when on the road. Our B is total electric and diesel fired for heat and hot water. No propane and no Onan generator. The compressor refrigerator runs 12v DC only.
We camped in dispersed desert BLM lands, remote national forests, backyards, driveways, parallel parked on residential streets, casino parking lots including the Las Vegas Strip, overflow state parks (parking lots), Camping World, Walmarts, Cracker Barrels, company parking lots, downtown parking garage, and maybe some I've forgotten. Our camping cost would have been practically nil if we hadn't opted for location in San Diego, Savannah, Charleston, Phoenix and Sedona. What it was coming down to toward the end was I was beginning to resent having to pay $40+ for campgrounds and the amenities I didn't need especially private campgrounds. Even the public campgrounds are going up in price. I have to admit I was not fond of eating a Cracker Barrel meal out of courtesy after about the third time. The last time in Henderson, NC we didn't. Timing and opportunity made us miss out on trying a Cabelas. We chickened out of parking in the Stovall, NC police station town hall parking lot because we couldn't find anybody around for a blessing to do so. Never got any 3 AM knocks on the door. We haven't tried a truck stop or rest stop yet.