Well I got my baby back on Tuesday. Boy, they did a great job fixing the damage. They actually put a whole new back end on, and seamed it on the sides. New interior walls, new shower back wall, trims and sealants all around. Sirpilla RV in Akron, OH did the body work and I'd sure recommend them.
Just thought I'd update. It's been four trips now, with three major storms and some bumpy roads, but the new back end is holding solid. A small drip leak around the side window was the only problem that has appeared; easily sealed.