I've also purchased lots of gas from Sam Hill and also had zero issues. Our RMX high compression head mod gets pretty unhappy with ethanol in the fuel so if there were going to be issues, we would have seen it.
For people riding the gunnison area, or traveling through gunni to sw co, Gunnison Tire on w. Tomichi Ave. in Gunnison has ethanol free 91. I tested it and its eth/alk/h2o free. Best part, only 3.92/gal !!
Brad's Conoco in Lakewood has the non ethanol 91 octane and I have been running it for several weeks without any issues. Running high compression head and no Det codes to speak of. They say that they have been selling a lot of the non ehtanol and keeping it fresh. As of today 03/06/2014 it was $4.39 / gallon.
I know most of you don't ride around Craig Colorado but we do have a station that sells non-ethanol premium now it is the Sinclair on the east end of town across from the Kum & Go! on US 40