Lee - note I did PYG first then ascended Ingleborough via Park Fell and then Simon Fell before traversing the rim of Ingleborough itself and then onto the summit. So if you doing it this way you'll need to park at Ribblehead and walk back along Gauber Road past the bunk barn and take the turning on your right and go up past Salt Lake Cottages, ascending Park Fell, Simon Fell, Summit of Ingleborough and then take the 3 peaks route in reverse down Ingleborough and up Whernside. It's a steep but shortish slog up Park Fell and the path over Simon Fell is well trodden, follow the rim route if you don't suffer from vertigo, well worth it.