Like Keith said
I would thik remove and replace. If you try to straighten it and weld it up, I would be concerned about it wouls want to bend again. Thats a drag, did the wood stress as well? Can you take a pic from farther back? Good luck!
That must have been scary when it happened! And, I agree with Keith, don't try to repair that portion; replace it. I'm sure that if you call FWC and tell them what part that is (looks like either the front or rear folding wall to me) they'll be able to send you a replacement for a reasonable price. They'll probably give you good advice on how best to replace it, too.