<HR style="COLOR: #ffffff; BACKGROUND-COLOR: #ffffff" SIZE=1><!-- / icon and title --><!-- message -->http://www.youtube.com/watch?v=nP-J40sb33s This could be the next big thing
The Iditarod is something like 1100 miles long and is done in around 12 days. That's pretty intense, but I think it shows that a dog team (even a team of two) can go pretty much anywhere you want them to.
On wheels, the dogs could undoubtedly go further and faster. Sledges are a drag. I had a friend in northern MI that ran dogs, summer and winter. The training sledge was wheeled. Lost touch years ago. But a diesel doesn't need to sleep --