The low temperatures will not hurt the fabrics. Be sure to remove all canned and bottled goods. Seal all the places were mice might get in and put out a few boxes of mouse poison. Make sure tanks, lines and toilet are property drained/winterized. Make sure everything is bone dry before closing it up. Other than that, do what you can to prevent any possible water intrusion.
Happy Camping! ///// Richard D.
2006 4x4 Ford 250 SD / 2007 Flagstaff 827 FLS
One very patient wife and one furry child who travels with us. Forty-two years of trailering and camping, and I still have a blast.