I was 'rear-ended' while towing my TD last Labor Day weekend. Fortunately the little 'decorative' bumper that I'd built & added to my TD protected most of the rear of the 'coach' & apparently directed most of the impact to the chassis. Trailer was still towable so after careful examination & a few miles at minimum speed, I continued on with my trip to an adjoining state. Upon return home a more extensive examination revealed that the impact at the rear was transmitted to my TV (thru the chassis??) enough to cause some distortion/misalignment of the receiver. No damage to the TD chassis other than the rear 12-15". Took a couple of months (mainly just to get some attention from the other driver's insurance company), an estimate from a RV service/repair shop, another estimate from an auto repair shop (receiver), & a visit from the Ins Co estimator/rep. They finally came up with an adequate settlement offer for damage to the TD which I accepted. Actually took longer to get them to pay for the new receiver than the TD (Toyota won't warranty the tow rating unless the factory receiver is replaced with a 'like' item which apparently is available only from Toyota

). I was able to repair the structural damage and pretty much of the cosmetic damage without a great deal of trouble.
Do as others have said, get your TD home & get an estimate or three from a 'qualified' RV service/repair shop, at least as a start. Also, very important, keep accurate records/notes of all contacts with everyone you talk to or visit with that has any connection no matter how remote, with the accident and/or subsequent activity. Good luck, sorry 'bout your accident.