I can't say enough good things about our new tandem hauler. It fits 5 people, can fit 5 bikes across (tandems fit without any problems), and gets 25+ MPG on the highway. I have talked to numerous people with mini-vans who say they are hard pressed to get 25 MPG on the highway.
2002 Sprinter Wagon by
Sallad Rialb, on Flickr