sites/forums to find a mechanic when out of town ?

Most communities have a "Pennysaver", "Scotsmans Press", "Bargain Sheet" or other publication that comes out once a week. Tabloid size with classifieds and business ads. I also use these to find local festivals, firemans fairs,have gotten some excellent food at small town fundraisers.
You should be able to find these on the free racks and lobbies of stores and other businesses.