So sad! This issue of tracks being closed requires a solution, similar to what happened to a Veterans rest camp in Minnesota. The camp was donated to vets with PTSD as we know it today, just after WW1. But the county and state wanted that beautiful 600 acre lakefront property for their own use. The county tried to regulate and/or tax them out of existance to get the land.
The solution was a bill passed in the US congress to make it forever untouchable, similar to a national park. Somewhere close to Pheonix there has to be a chunk of desert big enough for a multi use facility that could be established, and untouchable for ever. Time to contact some senaters and congressman.