Update:
I called the front desk with this question while there, and the cm said that I should be able to ask the bus driver for the next bus to MGM to take me there. It didn't sound promising with the tone in his voice, though. When I got to the bus stand, a bus came along within 5 minutes and I asked the driver that question. He sounded very surprisied and said that he couldn't do it, but that he would take me to MGM where I cloud catch a bus to the Yacht Club. I had about 45 minutes untill the ressie, so I went for it. Also, I was the only one on the bus. A few minutes later, the driver had a change of heart and radioed to see if he could take me directly to the Yacht Club. They said yes, so off we went. You should have seen the looks on the faces of the poeple at the Yacht Club bus stop when they saw a bus marked Carribean Beach on it pull up!