I have probably one of the lightest slide in campers made, a Four Wheel Camper Hawk. The manufacturer sticker says 760 pounds wet, propane and 20 gallons of water. I ordered mine with the common optional items: electric frig, furnace, dual batteries, jack brackets and some other lighter weight accessories.
After delivery, I removed the jacks and drove to the scales. Dry and completely empty it was 1,340 pounds.
My point is, I guess is that there is probably no such thing as a lightweight camper. Adding people, water, tools, toys, food, etc, etc....it all adds up fast. Add another 1,000 pounds probably.
I went with a 3/4 ton for one of the lightest campers made. I look at it a little differently I guess: I would rather have an excess of capacity than to be over my weight limits.
On the plus side I haven't had to start a single thread about air bags, super springs, timbrens etc.