We have a '97 34' which is much the same as what you are looking at. Our latches rusted as well, and I replaced them with stainless. It is a simple job. We have several "wrinkles in the skin from normal flexing going down the road, and the occasional gas station tail drag. The trailer is still solid and leak free. I am very careful with her, but on our first couple of outings it was a learning experience. Also when backing and making a tight turn the rear axle wheel are forced to skid sideways which may also contribute to the skin ripple.
Craig and Carol
1997 34' Excella 1000
1970 27' Overlander, International
2009 Ford F150 5.4L
ProPride hitch with 1400# bars
Past President Southeastern Camping Unit (12)