Nevermind, I got it figured out. There's a bug where if you don't add stops the Road trip will "freeze" when you back to edit it. Probably b/c there's not <Route Stops> argument in a formula somewhere. I'll let Tim know. It is a cool feature.
Thanks! I was just there for the a very short time, and only had the one afternoon to play. It was a tough call on which ones to hit. But there just wasn't enough daylight to get to all the good ones. :-)