I just flew my '12 from Albany, NY to Sebring, FL & back for the expo. Looked up the airports that supposedly have MOGAS, but was cruelly disappointed by what I found. In fact, only 1 airport (New London, VA (W90)) actually had it. I re-fuel there coming & going. Even Sebring, FL, which is a huge center for Light Sport flying, couldn't sell me MOGAS because their pump was blocked by vendors. Of course, they were delighted to sell me 100LL for $6.50 a gallon!
I believe the parameter which determines the more stringent specs for maintenance is 10% or more use of leaded fuel. IMHO, Rotax wants us using MOGAS. Fortunately, many towns now have 1 or more stations with alcohol-free hi-test. I assembled a cheap but very effective 15 gallon fuel caddy, and my bird gets nothing but pure gasoline 95% of the time; no lead, no alcohol. The absence of lead additive keeps me on the easier maintenance schedule, and the absence of alcohol additive means infinitely longer life for rubber parts, seals. I also keep the tank nearly full, as my fuel has NO water in it, whereas air does.
Just sayin'.
JRo