I fish right off a forest service road near the Appalachian trail. Tons of hikers on the trails, but no fishermen or otherwise in the water because you have to clamber over glacial boulders. If an area is crowded here, just a few dozen feet off the road or less down a very steep and forested embankment tends to result in complete solitude. I have the good fortune of being a young-ish and spry-ish forty though. Still concerned about having a bad fall and getting hypothermic in the cold water before someone finds me...However, for me, a little bushwhacking always yields good results. Probably also helps to be a very hyper technical fishery where most get skunked.