RVs can be a bit like boats. The further offshore you go in a boat, the closer the pointy end gets to the blunt end. Likewise, the longer one spends in a RV the smaller it gets. The smaller it is to start with the faster it gets even smaller.
Somewhere for each of us there is a good compromise size that has the comfort for long term living but is not too big where it cannot be taken into the nicest CGs which all too often were built at a time when 30' plus rigs & slideouts were not even thought of. The bigger you are the less chance there is of a site in one of these NPs or SPs that can take you. It is physics. Yes, size matters.