I fished that area (above any AMD polluted tribs) in mid-June and there was a good variety of bugs.
So, you have a decent chance of hitting some hatches at other times as well.
At this time of year, wherever you fish, just keep in your vest or pack imitations for the typical major PA hatches of this time of year.
Just look at a general hatch chart for PA or the eastern US.
And if you are fishing at a different time of year, like late May / early June, be sure to have the imitations for the major hatches of THAT time period in your vest.
Or be a pack rat and carry all your flies all the time. Which makes for a full vest, but eliminates the hassle of rotating flies in and out.
Detailed hatch charts do not exist for all streams. But, you just don't need that. If you carry imitations for the major hatches, and a good variety of generic patterns, you'll be fine.