Mark -
The fixed cameras, since they are marked a short distance before by road signs, I don't think would be a problem to GPS mark them for yourself. Once you know they are there they are very obvious also! Arizona is starting to use the speed cameras all over - they are even coming, at least in the van form, to my neck of the woods in the near future. They don't hide them, and in fact I think in AZ its illegal to hide the speed cameras. That says nothing about some officer sitting with a radar gun (I know about them too having recently been stopped that way - DANG oversized tires on my truck!!!!!!

)
So, no is the answer to your question. In the Phoenix area they are along the Hwy 101 in Scottsdale for sure......I don't spend a lot of time there, so don't know where else the fixed camaras are. The vans obviously move around.
Becky