I am in Maryland and we have a beautiful park next door in Fair Hill. So far everyone shares well and that means hikers, bikers and HORSES. There are signs all over telling who has right of way (bikes yield to everyone)and people are pleasant enough. The local bike shop and a bike club do a lot of trail maintenance, so that helps bike tolerance. But the horses are everywhere, looking nervous and pooping. I could do without them, their little hoofmarks are in the middle of every torn up stream bed. Of course tire marks are there too. But I am happy that the horses have a nice place to walk around in. I just don't understand them.
And into the mix go bow hunters in specific areas during hunting season and for five days a year gun hunters too. Everone stays out of the woods on those days, it's well advertised.
The Delaware park near us has a good idea. People who do trail repair get to use the park for several night rides, when the park is shut.
I pick up trash (there is very little) and pay my yearly user fee of $75.
Hopefully it will stay open forever!