I had a 2" receiver custom built and welded to my TT, to haul bicycles. I have never used it to pull a tandem, but wouldn't be concerned about doing it for a short distance if I was in weight and length spec.
At one point you mention the last couple hundred miles, and another time you said the last few miles. If its really only a few miles I'ld go with you initial thought. Storing your bike trailer in your campsite may be tough.
2007 Chevy Duramax LMM/Allison
2012 Jay Flight 29QBH
2012 Jay Flight 26BH (Sold)