The shuttle from Routt to Six-Mile only takes about 30 minutes round-trip. Paying $100 for a shuttle service is not necessary unless money is no issue. Even if that's the case, I wouldn't do it out of principle. You can be almost totally certain there will be other boaters putting in at Routt (on Memorial weekend) who you can team up with to run a quick shuttle. Or, you can walk the dirt road (about a mile) to the highway from the Six-Mile take out and hitchhike back to the put-in. We showed up at the put-in last Sunday with just one vehicle, had it shuttled thanks to other boaters, and were launching within an hour of arriving.
"Running rivers is the physical expression of intellectual passion."
-Richard Bangs 'The Lost River'