We have lots of dog parks and even a dog beach in our city. Dogs are allowed off leash, but must be under voice control of the owner, i.e. don’t let your dog loose to run free, then walk away. I’ve never seen a dog fight in all the years we’ve been going. Our dogs might challenge a dog that came into our yard, but on “neutral” ground, they could not care less, and just run and play with the other dogs.
The parks used to provide the little bags to clean up after your dog, but due to budget cuts you now have to bring your own.
My local dog park provides the bags. But I usually bring my own since I keep them with my dog walking stuff and my dog normally wants to poop once before he gets into the park. The park is sponsored by Hill’s. They might be paying for the bags or it could be the city. Most people clean up after their dogs out there but it would be nice if there was a pooper scooper out there so people could help clean up if they felt like it.
I save the bags vegetables come in at the grocery store and stuff those in my pockets when I take the dogs for a walk. That way it costs me nothing and reuses something I would toss!