Sorry for the bad experience. Over the years, this subject has come up more than a few times. The bumpers are apparently for looks and to stow the sewer hose only, not sturdy and as you said, WILL void the warranty. The same bumper is used on many, many trailers, not just the FR you bought. We had both a HTT and now a TT with the same bumper. Did your dealer actually go ahead and mount the bike rack or are you still ok? If you have occasion to talk to FR again, I would certainly mention that your dealer would have been happy to mount either of two racks on that bumper. There are several good racks to be had. You might PM bikendan for a recommendation if he doesn't chime in....a serious biker and knows his stuff.
Trailerless but still have the spirit
2013 Rockwood Ultra Lite 2604 - new family
2007 Rockwood ROO HTT - new family
2003 Ford F-150
4 doggies - We support Adopt/Rescue.
Sam, you were the best!
Cubbie, Foxy, Biscuit and Lily - all rescues!