>I called Advisor to see if they set up a shuttle service from the airport to the hotel in Las Vegas, and they have not. I also called the Marriott hotel, but they didn't have any recommendations either. They said it would cost $40-45 one way by taxi. That seems a little steep to me. Any suggestions?

When we faced that situation in Orlando, for example, we simply made arrangements to meet at the airport, for those having flights which arrive about at the same time, and shared the cab.