Hopefully this is going to give you some ideas
http://www.actioncamper.com/details.php?artID=5&ktid=1&lng=en
I still think you're going to need airbags for the rear but that's 70$ fix+air
compressor
Good luck!
ABS Plastic 11lbs per sheet x 3.5 sheets=39 pounds
Plywood at 20lbs per sheet x 3.5 sheets=70 pounds
2"x2"x8' at 4lbs each x 12=48 pounds
1"x2"x8' at just over 2lbs x 10 each=20lbs
Canvas approximate weight=10lbs
Pop up supports=6lbs
Adding small cupboards, storage area=10lbs
Approximate total weight of camper=208lbs.
Me 175lbs, wife 115lbs, dog 55lbs, kid (not here yet)=345lbs of mammals.
10 gallons water=80lbs
Clothes, stove, pots, pans, cups, etc=20lbs
Food=30lbs
Extra payload from above=475lbs.
So 475lbs. of stuff, plus 208lb. camper=683lbs. + 2,000lb vehicle weight puts it at 2,700lbs which is well within the 3,000lb gross vehicle weight spec.
With that, I also took off the 50lb back tailgate............so give or take 100lbs of crap, I should be good to go with the gross vehicle weight. We will be packing light. Like a glorified backpacking trip with an internal combustion engine for assist.