Having grown up in the area, I know them very well. There are at least 7 high quality Pizza shops in Old Forge. Pizza is broken down into two types there, Red and white. Some sell both types but excell at one. What is interesting is there is no one "Old Forge" Pizza style, unless you are talking about the white Pizzas, which are largely a kinda super high fat grilled cheeze....
If you go ther, it would take three days to try them all. They are truly that different. One man's opinion, Rivello's fro red, Arcaro's fro white. Also, its orderd as " a tray", never "a pie". Just a colloquial thing.
For really unique and different Pizza in nearby Scranton, Try Pappas, located downtown. You will either love it or hate it.