Craig, my use of my FWC is unlike most of of the forum members. No extended stays for me. I use it as a parking lot condo at ski resorts, at trailheads from which I start mountaineering and backcountry ski trips, and camping/staging when I run ultramarathons. I do not use my Hawk for the sole sake of camping -- for me, that involves pitching a tent in the deep wilderness (far from any road or trail) or sleeping in a bivi bag on a ledge somewhere. I suspect that my perspective will change in time, now that I'm on the dark side of 50, slowing down and playing more golf.
I seek the add-a-room for those times when more than 2 or 3 of us are assembled at a trailhead or an ultramarathon start/finish.
When I park my Hawk up at Lot 3 of Alpental, our local ski hill, many of those in their unweildly mega-campers and RV's manifest envy by the ease with which I maneuver through the snow. For me, above all, a FWC is the perfect ski rig.