You can fish in the park, just not in the glens natural area. Was just there last year, and the lake near the campground (lake jean) was drawn down but still had enough water for fish. Wished I had brought my 8 weight and largemouth stuff, because bass were crashing baitfish in the shallows every night. Looked to be some nice sized fish. If you are looking for trout, check out the county guide on the Fish and boat site. A lot of small class a streams around, but some are on/cross private and posted land. Beautiful part of the state.