Use the space under the bed to store your luggage.
All Stars have the body wash/soap/shampoo dispenser mounted on the wall in the shower. If that doesn't appeal to you, take your own stuff. We fit five people in a room - four adults and one six year old (air mattress on the floor). We honestly did not feel cramped at all.
There are six drawers for your clothes plus the closet area with a shelf above it. There is only one sink, though. The table in the room is kind of small and you only get two chairs.
We used the top of the TV/dresser thing to store our food items and brochures, extra things, etc. I guess I just tried to keep as many things up and off the floor as possible.
About the only thing I thought of doing but didn't was to get a spring tension shower rod that you could put across the "entrance" to the sink area. You could hang a curtain there for a little extra privacy. We didn't do it and had no problems with just using the shower room for changing.