Another beautiful post, Francisk! We have a walking/riding trail similar to yours that I need to post about some time. I haven't observed anyone sleeping underneath the bridges yet, although every time I have been on the trail has been during the day. We have seen beer cans left there which aggravates me. People should have enough decency to clean up after themselves and not leave their trash like that :(
I can remember when people would just throw trash out of the car.
We don't see much of that anymore. The younger people are beginning to respect nature more.
Of course. There will always be some bad apples/people that refuse to learn.
Francis