I would not object to going out that way at all. What time frame are you looking at? It would be nice to finish up the SLC to Durango part with you and whoever else and head out for Sturgis,SD for the rally. I've never been to Utah before but I'm up for it. It can't be much farther than I rode this summer from North Carolina and back.
The distance is only 400 miles more than I did one way this year, and the ride from SLC to Durango sounds like a good time to me. How does leaving on the 20th or 21st of July 2010 sound to you for a target start date?