Is it just me or does the idea of having the camper hanging out really go against the low and forward weight distribution theory? Especially on a loaded camper...you would be way over weight and then in a bad location to boot.
Valid points and questions, let me share some of my current thinking on this subject for those considering such a set-up.
Exact data is likely hard (impossible?) to find, comparing equivalent campers on the same truck (FWC Hawk & Raven) and I've thought similarly about the rear overhang on a Hawk FWC on a super-short bed pickup. The best truck for a camper is surely a regular cab with a long bed (8ft), which offers the shortest overall length/wheelbase for a given platform, more pickup bed forward of the rear axle, more length for a longer camper, etc. Though most of us seem to want, need, and/or enjoy at least an extended cab truck for the features and versatility they offer, and crew-cab trucks make lots of sense for people with families who need the extra cabin space more often than they need a long bed pickup. We are also restricted to buying new trucks in the configurations they're offered by the manufacturers. I'd love if the Tundra CrewMax was offered with a 6.5-ft. bed like the Tundra Double Cab, but Toyota doesn't offer such a configuration and there would be a downside, a longer wheelbase. But back to the issue of weight distribution and overhang...
I think most will concede it's not ideal, to have a camper hanging off the rear of a truck several inches, either just for aesthetics, or possibly for weight distribution. Though like other chassis choices mentioned above, neither are heavy bumpers and winches that might be desirable for remote travel, nor a big engine that uses lots of fuel, yet handles loads well. We all make choices, most of which involve compromise.
Overloaded? That's a loaded question, however the overall chassis set-up, driver skill, and how the vehicle is actually piloted have much to do with what I'd consider overloaded or not. Experience and knowledge do matter, and even if a vehicle is set-up in such a fashion that the outfit is under GVWR and GAWRs, doesn't mean just anyone should be driving a certain combination. But we all have a hard time accepting that we don't know (me included), particularly when it comes to driving, which most have been doing since our teens, so few seek professional training.
While at first glance it might seem like a poor idea to have camper hanging off the rear, but is it worse than a heavy rear bumper with a spare tire and fuel? It might be that a Hawk out the rear an extra 10 inches is better than a Raven with junk behind it (something I'm actively considering). Then there are other, worse handling set-ups like much heavier campers, with wider and/or longer overhangs, and big trailers with huge tongue loads. All choices have compromises, and your mileage and experiences will vary
Me, I'm not at all uncomfortable with my (heavy) Hawk on my well-prepped Tundra.
$0.03