The weight of an RV or Camper will depend on the size of the RV or camper.
Smaller RV's and Campers will weight quite a bit less than larger RV's or Campers do.
The average larger camper trailers or RV's can weigh around 5,000 lbs which is dry weight without water in the tanks or anything inside the RV or camper trailer.
The average smaller camper trailers and RV's weigh between 1,500 lbs to 2,000 lbs and sometimes as heavy as 3,000 lbs to 4,000 lbs.
When you add in the supplies and have water in the black and grey water tanks as well as the potable water tank then the weight goes up a bit.