I purchased a 2006 six pac s650 from an older couple that barely used it. I bought it for the size of the beds and relative simplicity of the camper for when Im towing my off road car into the sierra...
Six-Pac was on my short list in 2005 while shopping for RV's. I even visited their factory. Nice product, but I decided that a small C was better for my camping style.
I still have a Six-Pac owner's manual from that time period in my files. It is a 17-page PDF, and I don't see a way to attach it to a post here. If you PM me and give me your private e-mail, I will send that file to you.