We currently have a Sportsmobile 2WD and are kicking around the idea of getting a 4WD vehicle. Not sure yet whether we want to go with another Sportsmobile or with a truck camper. (We currently have a...
....sounds like you want to navigate both urban and tight little-maintained "service roads".
We have been doing this since we picked up our pop-up truck camper (Outfitter Caribou) in 2005. Parking and navigating all manner of urban areas across North America: no problem, with our 2500HD long bed, and 8-foot pop-up. Just check underground parking for height if you go this route.