yeah i go there all the time. Its a descent track and theres a lot of fun jumps, just make sure you double check on their website,(speedworldmx.com) i think, to make sure the night you want to practice isnt a race night. unless you want to race or first time out. LMK if you want to meet up and go.
try going to gomxracing.com. Its a very cool site just for AZ riding spots and has info and directions to all the local tracks. they also have a section in the forums just for quads so take a look there.