Just additional two cents here (more of a ramble)...
My first truck was a M1078 LMTV. Great fun hauling bikinis at Spring Break. But I wanted a habitat (bikinis gotta sleep too, ya know).
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My original plan was to slap an ambulance box on the back (with bed removed). I had started the whole "overlander" thing based on an ambo, but fell in love the the LMTV platform. The ambo box was an interesting solution becaused they come prewired, insulated, and roll tested. Beefy little boxes. I snagged a M1082 trailer and figured I'd keep it around for hauling stuff (and it makes a great bikini-watching platform, just as the LMTV bed had been). I went back-and-forth on which would actually get the habitat and which would get the cargo top. I kinda liked the idea of the trailer/camper (keeping the truck stock for hauling and non-overnight adventures. I wasn't realy thinking about jacking up the shelter and parking it. I was leaning towards mating an ambo box onto the M1082.
About that time, an M1079 dropped into my lap and the decision was made. The truck would be camper, the trailer would be for hauling.
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The downside for me was that as time went on, a lot of ideas for the back of the truck got shot down because I had to still reach the pintle hitch. My M1082 trailer is very short and short trailers are a pita, IMO. The M1082 has a very short tongue and you can see right away how easy it would be to jackknife and damage the hab (and that w/o and changes to the rear of the truck/hab). Pretty much anything added to the back eliminates the use of a trailer. So no rear expansions, no rear slide out, no rear deck (that can't be folded up).
I also really fell in love with Neil's build and the ability to drop off the hab if the bed were needed for another purpose. If I were to start over from scratch, this is likely how I would go. I'd keep the bed stock and have the shelter on jacks to offload as needed. No trailer in the equation.
But I do carry a LOT of stuff on that trailer. Both camping and for projects. I've gotten so much use out of it that it's hard to imagine not having it (at least with my M1079).
One thing on my to-do list is to add a fold-down rear deck. That way it won't interfere with the trailer operation and I can leave the trailer hooked up when parked (using the side of the deck as entry point for the stairs (opposed to having to drp thew trailer every time I want into the hab).