Squeezer, you mention that your "expeditioning" is ultimately limited by fuel and water.
While that may be true, and is often 100% true, let me ask you this...
Q- whats to say a person or persons utilize their camper and rig for long term dry camping in one location?
Naturally water must be a concern, but there are simple enough ways to go about solving that problem.
As for fuel, it SEVERELY cuts the requirement for fuel, and depending upon how you do it, can nearly make fuel a non-issue.
Not exactly...
My "Expeditioning" is severely limited by vacation time... Literally nothing else.
Alaska aside where can one go in the USA and Canada that fuel range is a problem? How about water?
Unless a person is incredibly unlucky we just flat out don't have logistical problems in North America.
A Jeep Rubicon a couple of jerry cans, and $500 worth of gear at REI and you are as capable as needed for ANY trip imaginable in the USA.
Long term dry camping has very different requirements than Expedition travel. Water is the key factor there as we all know... And fairly easily managed if one is paying attention. And for long term dry camping in one spot a canvas wall tent is likely your best choice...