The actual name for this park is Anholm Park. The original CO's family call it Secret Park because it is very unobtrusive and not too many people know about it. The park sits on an undeveloped lot in the middle of a neighborhood. If you have children, bring them along and spend a little time enjoying the park. A picnic table is available.
There is really no way to be discreet if people are present, though you will not need to enter the park to find the cache. Reception may be spotty due to tree coverage. You are looking for a well-camouflaged micro with only room for a log. Bring your own pencil. Please take time to rehide the cache well, as this is a high-Muggle location.