Agreed, searching might be the best. APS trunked system likely has coverage there. You might hear one or two Motorola type 2 sites and possibly one or two new P25 sites for this system.
You might be able to hear an AzWins site or two. Let us know if you find any. They should be popping up around there soon.
You might also come across some business systems.
Let us know what you find searching. We don't have a lot of listeners submitting info for that area. Everything on Radio Reference relies on listeners like you submitting what you find.