Bert,
Welcome aboard. A PA license will cover you for the lower end of the wb (aprox 6 miles) and the main stem (20+ miles). If you want to fish the top of the wb or the east, Beaverkill, Neversink....you will need to snag a NY license. Swift water experience won't help on the Delaware. There's only 2 sections of fast water that come to mind and the flows are so low there might be some dragging involved. I'd bring a 9' 5wt for dries, 9' 6wt for nymphing and a 7wt if you want to streamer fish. Nymphs like s pheasant tail, prince, hares ear, etc in #12-18 should be good. Iso nymphs #12-14, various caddis larva. On top, caddis #14-16 in black, olive and tan, cahill/steno pattern #14, hebe (#16 sulphur will work), iso in #12-14 and olives in #18-22. If you need a couple of flies, I'm sure we can fix you up. Bring a net and camera.
If anyone cares, decided to go with pork loin and kraut for crockpot meal.