I would push hard to put a truck back on the table. They far exceed a SUVs ability to haul people and gear. With a truck you can keep an uncluttered passenger compartment; set a rule, no gear up front. I imagine with a family of five and all their personal "essentials", your passenger area is already very full. When you add in the gear needed to outfit 5 people, you really need the bed of the pickup, not the back of a SUV. I agree completely with your wife about the camper conversions. They are very inefficient if you like to do anything away from base camp. Would she be okay with a Toyota Tundra Crewmax with a color matched simple cap, or a tonnuea cover?