Thanks again for the input, I'll look up the the RP guide and print it off. As far as the Muhtar bit goes we are now sorted. It's the Passport Police you need to notify of change of address, but we were advised that as we would be doing RP's in August to wait till then as the Passport Police are snowed under at the moment doing new RP's. You don't have to register with the local Police anymore.
A bit more information for others. The Muhtar behind the Devlet hospital (in the wooden hut) is for Arcarca Mah. The Foca Mah Muhtar is up a side street from the Wedding Circle.
After you get the forms (form 5) from the Muhtar you now have to go to the Nufus Office, ground floor in the Tapu building in Fethiye, they will give you some more forms, one of which is a small slip which you need to take back to the Muhtar.