George,
It sounds like we're on the same track! I agree with you that just because it will fit on the truck doesn't mean its a good idea! I am also trying to keep a low centre of gravity and have an eye on aerodynamics. where I am stuck right now is that not many camper manufacturers make a decent camper without a huge basement, extended ceiling height, slides, etc. These things are all going to make too much wind resistance and raise the centre of gravity too high for my liking. The Bigfoot 15C9. 5 is a beautiful camper, has a low profile and centre of gravity BUT the tank capacities are smaller than I would like, the weight is still a little high (as is the cost!). The Okanagan 90W is a fiberwall construction, not a moulded fiberglass shell (as far as I know, only Northern lite and Bigfoot have the two piece moulded shell) It uses a fiberglass panel, pressure bonded to a extruded polystyrene insulation bonded to a vinyl wall board. It looks very strong and light but the unit is just not as sexy looking and having more seams has to be less desireable. The 90W is lighter by about 300 - 400 lbs, has more storage and is cheaper. With thermopane windows, electric jacks, oven, full fiberglass shower, fantastic fan, heated and enclosed tanks, stereo, 6 cuft fridge, larger tanks, rear bumper, innerspring mattress and matching comforter, etc. it can be had for $21,995. 00 Canadian pesos! Not bad.
As far as not enough room goes, I'm going to cheat and tow a trailer as well. I race motorcycles off-road and will be buying a 16' wells cargo or equivalent. I have two kids and I'm going to put two bunks, a portapoti, furnace and sink in the front six feet and use the back 10' for the bikes and gear. I will be carrying an extra 20 gallons of fresh water in portable tanks.
Dave