Jimmy,
I'm about at the other end of the bottom of Arizona - Sierra Vista - and I don't know of anyone around Yuma, just now. There may well be a few...
When? Do you have a lighted space to fly in for the midnight to 3:00 AM time slot? This time of year, that may be the only time of day cool enough out your way. (Just jazzing ya...) I'm up at about 5,000 ', and it gets too hot up here by 10:00AM most days in Summer, and the wind usually is up by then, too. So, early in the day until weather cools down...
Luck, and if you find any Gyrenes interested, talk up your success. It'll be interesting!