I've had GSDs and hiked with all of them. In my 20s it was conservation areas where we saw other people/dogs. I had a working line male that could be scrappy with other males. It was a pain. I didn't know enough then to do ay better, and I don't think we did awesome. But we found other more remote places to hike/walk where there were fewer dogs. I lost him chasing deer one time, got him back in one piece thank god but you have to be prepared and know you can call your dog off deer.
After him I learned to use E Collars and that was a game changer for us. I kept my first dog on a long line fr nearly a year because I couldn't trust him not to bolt if he saw a deer. If only I had known.
I used to hike in conservation areas with my girl who's 10.5 now. She was always gracious meeting and passing other dogs if they were nice to her. If they weren't, they might get a smack down. Another case of stuff I wish I knew then.
I have finally bought land in a rural area and hike on my own property now--I have hiked with her and my late male up in the national forest, passed a bunch of dogs and people and everything was cool. I don't hike at the "townie" type places though---seems like the lazy dog walkers are down there with their out of control dogs whereas up in the natl forest seemed to be slightly more serious hikers whose dogs were either too tired to start crap or better trained
My young male is now 2 and he has never hiked in a communal "dog hiking" place...he is intact, he is big, and there is just no reason for us to do it. I do take them to the national forest to swim and we sometimes see other dogs there but they are so into their own thing they pay them no mind.
Definitely with the orange vests and collars. Definitely with the recall. Everybody around here talks about how you can shoot a dog running deer...it's weird because the state is very dog friendly. The hunters talk about it though so they must do it? That's why we have a zero tolerance policy for deer chasing and we wear lots of orange.