PA has plenty of lists and maps and guides to help you find what you want. We have over 3000 wild trout streams, and plenty of stocked ones. Ranging from large to very small, wilderness to urban, etc.
This should help:
http://www.pasda.psu.edu/uci/SearchResults.aspx?originator=Pennsylvania%20Fish%20and%20Boat%20Commission&Keyword=&searchType=originator&entry=PASDA&sessionID=311509504201416132558
Approved Trout Waters = stocked.
If after wild trout pay attention to the class A wild trout streams (population density above a certain amount of weight per surface area of water), and stream sections that support the natural reproduction of trout (a larger list that includes lower density streams, but still often very good).
Also the Wilderness trout streams. These are generally a pick of trout streams from our fish commission. This is a small minority of streams that fit this description, but generally they are smallish streams that offer good fishing away from roads and population centers, and are open to the public.
In general, PA has a situation where our freestone waters vary in water temperature. The bigger they are, the warmer they get in the summertime. This means, in the more mountainous parts of the state, nearly every little trickle stays cold and holds wild trout, so long as it mostly runs through forest. They run small (10-15 ft across is typical), and are often infertile streams. The fish likewise run small and are agressive. These are mostly brookies. As streams get larger, they get richer, and warmer, and tend to favor wild brown trout. Once you reach a certain size, it's too warm in the summer to support trout. These streams are generally stocked in the spring and are seasonal fisheries.
We break that mold in 2 ways. One is tailwaters, where we have a few bigger waters which stay cold enough for wild trout due to a bottom release dam. The other is probably PA's biggest attraction. In central, SC, and SE PA, we have some streams which are limestone spring creeks, and generally arise from large springs with a very rich water chemistry. You can get larger streams cold enough for wild trout in this manner. And they tend to have A LOT of trout, which have plenty of food available, and grow quickly. Due to the food availability, though, fishing can be tough. They are not very opportunistic and will be very picky. It's technical fishing.
I too suggest central PA, somewhere around State College. You have some of our best limestoners pretty close. Penns, Little Juniata, Spring Creek, Big Fishing Creek are the famous 4, but there are others as well. There's a few freestoners close as well, and it's not that far north (certainly day trippable) to where you get into a LOT of those freestoners.
Heck, if you happen to be in that area on the 24th/25th of May, this board has a large get together in that area centered around that weekend (many come a few days early or stay late). We like newbies and would be willing to show you the ropes. Late May is the peak of our hatch season.
