Well, guess I answered my own question. Called Enterprise at the Rental Car Center. Told me that only American and Southwest were utilizing the remote bag check in service for now. Apparently airlines have to negotiate contracts with the airport and the other airlines, like Jet Blue, are still in the process. So, for now, unless traveling with AA or SW you will have to load your bags onto carts at the rental center and take them with you on the monorail to the terminal.