When traveling, the litter box goes in the shower stall with the cat and the shower door shut.
After we reach our destination, the box comes out and sit right inside the entry door. We have a short hall way there. We have pass through (2 doors) from the living area to the bed room via the bathroom, and also the hall. So, the hall seems to be the best location.
Prior travel trailer, we kept the litter box under the kitchen table. We never used the dinette table ... for anything except collecting junk. It was the most uncomfortable seating imaginable! We always ate outside anyway.