What kind of advice? Where to go, when, things to photograph, or respecting locals and their customs?
I was always led to believe that Islam can be at odds with photography (it's blasphemous?) and any recorded images of people. Certainly I've seen people turn away from the camera when shooting long shots in towns. It's important always to ask first before recording any close up images.
In my experience though I've had little in the way of refusals in Morocco, Tunisia or Libya.