SS = Super Slide (couch and dinette in slide)
RG = Rear Garage (large storage area across the back of the trailer, accessible from outside, no ramp) Might also stand for something else but that is how the term was used at one time.
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.