Thanks. I appreciate the information and suggestions.
I'm hoping to find at least 2 people to share. I'll pay $300 or so to avoid 4 hours sitting in the airport with luggage, but not $600. I considered the hotel option and it is not out of the question. One issue there is that I expect we could not check in until about noon or later so we'd have to deal with that. But if by spending a little more we can get a full-blown tour and get to the airport around 5:30 or so, that would be my preference.