So I have seen tons of people wanting to fit 4 or more people in a tiny trailer. I am actually in the start of this build, and I needed my tiny trailer to fit six. Mine is completely hardsided when deployed and should take only a few minutes to deploy. The best part is it is designed to fit on a Harbor freight style trailer. Second best part mine will use the jacks for a pickup bed camper to completely remove it from the harbor trailer when I need a utility trailer.
http://sketchup.google.com/3dwarehouse/details?mid=a6bc6a1c2c8d663d5e89be17d1a867d8