I agree with the Mongolian thing, but even then, I still wouldn't use a trailer. Two panniers would be ok for me. My standards of comfort are far below the "average" for the forum (as I see it.)
I toured 30 days, unsupported, with 8 pounds of stuff. It was amazing, and I've done every tour light since then. I hit Colorado this past winter and I did it with two panniers, and that included a 15º sleeping bag and fully enclosed tent.