Horace, this particular forum is about molded (egg-type) fiberglass trailers like Scamp
. Yours is made from laminated panels, which could be one of several different composite-type materials bonded under pressure to structural framing, insulation, and interior paneling. The rippling could indicate delamination, a common issue with laminated construction, though typically not on one so new. Molded trailers are not subject to this type of delamination.
You might get better help on a general RV forum such as iRV2.com
. You'll find plenty of laminated trailers there and likely a few Keystone owners.