This is why I wouldn't go. I wouldnt' want any of my dogs to 'have to put up with' other people's rude or ill mannered dogs.
The whippets would be fine in a dog park.. so would Kaiden (tho he would snark at a dog trying to hump him) If I lived in a city (or had no friends in the country) I would be very torn as to what to do. Likely I would rent out an agility training facility and let them run there with friends dogs....
THEre was a bull mastiff there that should have a medal hung on him for good attitude. THere was a weimer determined to hump him, i don't know where his owner was or why he was ignoring the behavior.