The problem with trying to get any of the tracks to build a UTV specific track is promising them that the numbers will be there to support their time/money/effort that would go into creating such a track.
Easier than that, I would think, would be to talk them into letting UTV's on the tracks they already have at certain times/days of the week/month. This would require very little work from them, other than having to fix the track after the UTVs had their way with it.
Coming from the QuadMX world originally, this has been an ongoing battle even with quads, simply because the numbers were never really there to make it worth a track's while to seperate quads/bikes (I never minded running with the bikes - it was fun - but the bikes complained alot about riding with quads.)
Anytime a track pulls off it's bread and butter to allow a smaller number of individuals track time, it's risky for the track as far as losing income goes. I understand this, and while it sucks....it's just how it is. There are ways to compensate for this, such as raise practice/race fees to make up for it, or schedule it at a time that is normally very slow anyways, but it has to be worth the potential loss for the track owner to even try it.
ET's Vet track was awesome in a UTV. I don't even know if that track is there anymore......I have also raced on ACP's National track in a UTV - not for the faint of heart, but really challenging and fun! Speedworld was always a good time - and they were the most open to UTV racing out of any of them....unfortunately, it's just not an option anymore.
This is just a slump for AZ short-course racers. I think that Dan (hope, anyway) will find another piece of land to build on. I also think that we will get Firebird back pretty soon. For this time being, we are traveling to the CA races to get race/seat time in our SR1's, and now we have Yuma for the first time! this is Arizona, so I can't see us being without SOME tracks here for very long.....I think it will just take some patience, and maybe some sweet talking to some current MX tracks to see if you guys can get on their MX tracks for some laps once in a while.