The city of Malvern has decided it is okay to hide caches in their parks with a permit from the Malvern Street Dept. (they also oversee parks)
I currently have one pending GC review and one pending approval of the park dept before I post it to GC.
This project is still in it's infancy and the dept head is still a little leary of the concept but decided to go ahead with it, so if you want to hide one there make it worthwhile and don't overwhelm them with requests.
I'm not real sure what all parks they have there to be honest, both of mine are in the Ouachita Whitewater Park near the interstate, but I know the guy that does the approvals wants them someplace he can get to without spending a lot of time (he does have a street dept to oversee after all....) so keep the hikes short for now.
The permit is nearly identical to the State Parks permit form, but he isn't bothering to assign them numbers as yet.