We have the 2012 Roo 19 and through some trial and error, me and my wife have a system that works for us. We discovered that while I'm outside folding the front bunk up, my wife is inside the camper helping the mattress and canvas collapse "gracefully". Once the front bunk is almost closed, she comes back outside, makes sure all of the canvas is clear of the seals, and with one more push, the bunk end is closed and latched. Does your mattess fold about 2/3's of the way on one side? We keep the curved support pole inside the fold of the mattress, and snap the strap on each side. This process keeps excess canvas out away from the dinette and couch.
Mike, Jen, and two mutts Oscar and Ollie
2012 Rockwood Roo 19