PMK: go to
Johnny Rack - Bicycle Racks for Motorcycles and you can see better pictures of the rack.
You can leave the rear wheel on the bicycle, or take it off and mount it next to the front wheel and bicycle. Doing that shortens up your overall length by a little bit. Nothing is bungee corded on with these racks, the wheel skewers clamp the wheels onto the rack.
As for stability, cross winds will blow you around a little more, but on a tall bike like this, you kind of expect that anyway. And I was amazed at being able to ride some fairly hairy 4wd roads fully loaded with no issues. This trip was a big eye-opener about the capability of this bike.
And yes, we rode the 401. That's a must-do on any Crested Butte visit!