There definitely was a significant number of TR's stolen a few years ago. As the story goes, someone associated with a local GM dealer was getting VIN's while customers ordered parts. Then they would get a copy of the keys from GM. (Of course they knew where the person lived too). They would then strip the cars, and the drivetrains would end up in dune buggies, etc. I can't validate this, but in a lot of ways, it makes sense.
So the theft problem has slowed down, but I'm sure it still exists. I don't know the Barcelona hotel, so that really makes me think you're in a bad spot Lou. Assuming that you're towing the car, you might be better off to detach the trailer and car at the Silverton, and then drive the truck to the Barcelona.