Don't take this the wrong way, as I'm being serious, and sincerely trying to help you.
You'll find you'll catch more fish, and learn more good places to fish by fishing, as opposed to asking questions about places to fish. If I haven't offended you, and you try out this advice, you'll quickly realize the wisdom in it, and begin to build your own cache of good places to fish.
A guy I fish with a lot, and a frequent poster on PAFF, says "cast first, ask questions later." Good advice. Most times you'll find your answers by simply casting. Or if access is the issue, going and checking out a stream in person. Some streams I thought had good access from research were completely posted up, and vice versa. Never know until you look.
I know nothing about Tohickon. Nevertheless, my advice is, go fish it. Or at least check it out, and see if there's viable legal access to fish it. If you find good fishing, store that in your memory for places to fish in the future. If it's a dud, try somewhere else next time out. I love checking out new streams. Of the new streams I fish, only approximately 1 in 3 makes it onto my list of places to fish again. You'll strike out more than you'll hit homeruns. The HR's are well worth it though.