Desert Sands RV Park and Desert Ridge RV Park in N. Phoenix off I-17 are two other options. Both would make for easy access to the Phoenix Open which is just off the 101 loop about 18 miles east of I-17. Both are public parks which probably get pretty full during the winter so reservations would need to be made early. McDowell Mtn. Park would be my preference, but it too fills up during the winter months. The ones off I-17 would probably be less of a hassle for getting to the Open. I haven't been to either of those two parks but I live fairly close to them and know the area well. You could always check them out at RVParkreviews/Phoenix.