The HC uses a modular system. Every component can be taken out and moved to form different configurations. As is, it sleeps 3. With three additional cubes it would sleep 4. The HC has moon hubcaps. They are not on because the trailer is so light we use an anti-theft wheel lock which is included. Also included is a cube with fridge drawer and a Thetford portable cassette toilet. The front and back windows allow you to see traffic behind you.