I don't like to recommend out of state locations, however a steelhead trip in early to mid October is very risky in Pa waters. No water can equal few fish only near the mouth.
I would recommend fishing the Cattaraugus Creek in western NY. In normal years it fishes best in early season. The creek is large enough that normally flows are sufficient to allow lots of early fish.
Motels are your best options. Search for steelhead guides in that area.
Now if you could wait until mid November on, then Pa tribs should have enough fish scattered throughout the streams.
The Cat has many dirt roads on an Indian reservation. Guides know stream access as well as conditions. Pa streams have very well known access points. Guides could provide access to posted waters if they have an agreement with the property owner.
Fishing techniques are really simple. Dead drifting egg patterns, wooly buggers and nymphs always produce. Unless you are a beginner, fishing techniques are typically easy. Look for fast dark green water, have enough shot to get down and have a long drag free drift and you will catch fish.
The Cat typically calls for larger and brighter egg patterns.
I find most fishermen to be quite helpful if you ask questions.
Steelhead fishing is a lot of fun. A 7 or 8 weight rod is nice. Minimum is a 6 weight rod.
I hope you enjoy your trip regardless of where you go.
