Diesel vs gas......................

I am a mechanical engineer, but do not want to debate the pros and cons of the two engine types - either can be good or bad - I have had both: gasoline - 32'class C w/ Ford FI 460 - about 10 MPG and my current 45' class A w/500 HP Diesel - about 7MPG. The diesel rig is MUCH larger and much more powerful (there are more comparable engine sizes) but my point (and preference) is the diesel, because I can put anything in it or behind it with little change in efficiency. I could really tell when I pulled my 16' boat behind my class C, and my mileage went to hell. With 500 HP (and over 1800 ft-lbs of torque) I get 6 or 7 MPG whether I'm full and pulling 20,000 lbs or empty - terrain is the biggest hinder to mileage and only by less than a gallon. I don't want to have decide, do I leave some of my gear at home, etc, I can (and do) take everything, including lots of firewood, extra camp chairs, a table, EVERYTHING and anything I MIGHT need - with no loss of speed or fuel consumption. I can also go over half-way across the country on a single tank of fuel, and with a full tank, stay in a remote area, in the dead of winter (thank goodness for Aqua-hot heat) for over 2 weeks and be warm and comfortable. Cant do this in a gas rig...you'll freeze or run out of propane (and water). Get as big a rig as you can afford, with as big a diesel as you can, and you will be more comfortable...(in my humble opinion).