You would be surprised at the amount of stuff you carry in the RV that you rarely use. It all takes up valuable space, and extra weight to pull down the road.
This is so true. We have a large garbage bag of stuff every spring to take to the Thrift Store - clothes, shoes etc.
We weigh our truck and 5th wheel every fall before heading south, and the last few years, we started weighing the 5th wheel axles side to side. (This year we actually weighed each individual tire). We were surprised a few years ago, to find we were 900 # heavier on one side than the other. We now stow accordingly for travel and have displaced of that weight.
Many of us Fulltime to get rid of stuff, but apparently it is our nature to continue to collect.