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DPS uses 460.200 Metro East, and 460.175 Metro East Tac, for the 101 Pima/Price freeway from I-17 in north Phoenix down through Scottsdale and Tempe into Chandler, as well as I-10, US 60 and the 202 Red Mountain/Santan freeways through the East Valley. They use 460.475, District 11, on the Beeline Highway, AZ 87, which runs from Mesa northeasterly up through the Salt River community, past Fountain Hills and up to Payson.
MCSO is on the 4 East talkgroups. Fountain Hills is District 7, the rest of the Northeast Valley is District 4. The Southeast Valley is District 1, with the exception of Queen Creek which is District 6. Use the county's Thompson Peak site. You'll have to listen to all 4 district's on the East talkgroups, unfortunately.
The Salt River recreational area and the recreational lakes northeast of the Valley are on the MCSO's Lake Patrol talkgroups. Again, use the county's Thompson Peak site.
Scottsdale PD is on Simulcast H in Scottsdale, and the Thompson Peak intellirepeater of the RWC system. Some of the talkgroups may also be available on Simulcast B in Phoenix. A-1 South, A-2 North, A-3, A-4 are the main talkgroups. A-5 Event 1, A-6 Event 3, A-7 Traffic, A-14 Tech, C-5 Event 2, C-6 Event 4, C-7 Traffic, C-14 PD to Municipal Services, D-6 Training 3 are other clear TG's.
Scottsdale PD also uses "Hotel Net" 460.350 to communicate with local resorts and hotels when needed.
Paradise Valley PD, which sits between Phoenix and Scottsdale, is on 857.9625.
Phoenix PD is on Simulcast A of the RWC system. You'll want 200 A & B (Black Mountain Precinct, far north), 600 A & B (Desert Horizon Precinct, northeast), and 700 A & B (Mountain View Precinct, east central). They may also be monitorable on Simulcast H in Scottsdale.
The Ft McDowell Yavapai Apache Indian community just northeast of Fountain Hills uses 411.675 & 408.475 for PD, and 154.085 & 158.880 for FD.
The Salt River Pima/Maricopa Indian community east and south of Scottsdale and south of Fountain Hills use 453.575, 460.1125 &460.1375 for PD, and 453.725 & 460.1625 for FD.
The Phoenix Regional Fire Alarm Center (Phoenix, Paradise Valley, Scottsdale, etc) uses A-1 154.190 for regionwide dispatch, and A-5 153.830 (northeast Phoenix) and A-11 154.025 (Paradise Valley & Scottsdale) for fireground and HAZMAT calls. On the RWC, you want K-1 for dispatch (simulcast of 154.190), K-7 is the primary EMS Tac for northeast Phoenix, Paradise Valley and Scottsdale, and K-10 and K-11 for mountain rescues and multi-patient MVA's. The K-deck talkgroups can be heard on Simulcast B in Phoenix, Simulcast H in Scottsdale and the Thompson Peak intellirepeater.
Rural-Metro FD (Fountain Hills, and the Carefree & Cave Creek area north of Scottsdale, as well as other areas) uses 154.370 for dispatch and tactical uses (repeater), and 155.805 & 154.400 (simplex) for tactical uses on larger incidents.
The Tonto National Forest sits northeast and east of the Valley. 164.825 Fire Net 1, 170.500 Fire Net 2 and 168.725 Admin Net are the 3 main channels.
Enjoy your stay.