My only concern would be the twisting, rolling, and stress any form of "off roading" would put on the PC. I could see stress fractures in the outside skin developing, rattles like you have never heard before, etc. If you are really just talking dirt road driving I do not see the need for 4X4 that would reduce your MPG significantly and increase your center of gravity considerably making the coach far more susceptible to cross winds. I have never driven a 4x4 PC so perhaps they drive great? Quigley systems I have heard stand up nicely so I would not worry from that angle. Four season usage is another black box. I know some have used their PC's in the winter (I am talking very cold weather like below 20 degrees) with OK experiences but every RV I have attempted to use in very cold New England weather has not turned out well to be honest. Doors swell and freeze up, condensation is a real pain, constant water pipe issues despite all efforts to insulate, road salt everywhere, holding tank issues in dumping, generator box getting filled with snow while driving, just not worth the effort in my opinion. If I was a single guy looking to do what you say you want to do I would buy a big 1 ton 4X4 Ram or Ford dual wheeled pickup and buy a Lance truck camper with the artic package to put in the back. You could then easily go in the back country and have the truck to explore if you drop the camper off. Less room perhaps but check out some of these new truck campers with slide outs and you will be surprised. just my two cents.