Dodge guy....that looks like a really solid setup with those hooks and ratchet straps. Seems like by eliminating all of the bounce back there you really reduce the risk of frame damage to your travel trailer.
Perhaps if I have my welder go back and improve those joints via gussetting/better beading, etc along with adding those hooks and straps like you have I may be able to run with the four bikes on the back again?
Despite the dog destruction encounter, for now the front setup seems to work really well. I mean, what the heck are the odds of another fleabag deciding to attack the front end of my suburban running 55 mph down the highway?