I think an F250 would be the minimum, especially if you want to make your rough road towing a breeze. An F150 would be stressed out towing 9,000 lbs (when loaded up for extended camping) over those steep, deep arroyos. Our dry weight is 7,800 lbs. You could lighten that up by skipping the big solar system, cutting back on batteries, carrying less fresh water, and emptying your gray tank before traveling. Even the permanent roof sealant we had done adds a bit of weight and could technically be skipped. We tow with an F350 diesel because we already have the truck and we like it. We can barely feel the trailer back there even in high wind. If the truck ever dies and we want to travel extensively with this trailer, we will most likely go with an F250 Tremor.