I'm not sure there is more wildlife but the rest is pretty accurate. I'd say the cover that holds trout is almost exclusively boulders and plunge pools and there is very little in the way of woody cover. Won't really change how you fish it but I always found that interesting.
There have been major problems with low fall/winter flows and anchor ice the past few years. As a result many streams are on a down cycle right now. The larger ones, and smaller ones that were ridiculously overpopulated to begin with, will treat you better. Avoid Hazel, Brokenback, N Fork Thornton and Piney, and all west slope streams except for Big Run and Jeremys Run.
For a quick trip I'd recommend picking between Staunton, Rapidan, Conway, Pocosin, Rose, Hogcamp, Hughes, Whiteoak Canyon (Robinson on the maps), and Cedar. All very good and easily accessible by SNP standards (Rapidan is a very rough drive in to the middle but you can also easily hike up from the bottom - will take a while to reach the trouty water though).
Also be mindful of water temps on hot days. Here in VA it is much warmer than NE PA. Rain has been plentiful this summer, though.