Welcome to AZ!
In a nutshell, Loaded Open Carry is legal just about anywhere in AZ.
You can't carry on K-12 grounds.
AZ doesn't recognize the 1000' school limit.
Don't carry places that serve alcohol for consumption on the premises without a concealed carry permit, and then, it has to be concealed and you can't drink.
Don't carry in government buildings.
Open carry in a vehicle is a bit trickier, just leave it in a holster and put it in the glove compartment or console and you're good.
I think that about covers it.
Enjoy your stay!