I owned 4 truck campers before moving to 5th wheels. Wish I had kept the last one and just bought the 5th wheel out straight without trading in the truck camper. Truck campers offer complete comfort with no stess driving anywhere you go!! Your only restriction is being vigilant of height restrictions. You can go anywhere or park anywhere that you can drive a pick up. Buying fuel, parking at tourist stops, driving in small towns with sharp 90 degree turns at intersections, going up narrow two lane roads both paved and unpaved is a breeze. All of these situations can cause you problems when pulling a large trailer.
We like our 5th wheel and the comfort it affords us, but boy do I miss the utility of truck camping. It would also be nice if I could take the boat with me now instead of making two 90 mile trips, one with the camper and one for the boat. For the long trips where we sit down for a week or so, the 5th wheel is nice. For simply running new roads and routes where you are uncertain about your destination or route, nothing is better than a truck camper!
On the down side, when you trade in a truck camper they give you very little for it "because truck campers are unpopular and hard to resell."