The posted coordinates are not the cache. They are, however, at a pretty decent park that also doubles as a lunar eclipse viewing station! The cache is within a short enough stroll from here, but if you're solving this cache, I suspect that you will just hop in the car and arrive right at the final location instead. Up to you, but please don't park on the lawn.
The cache owner has given explicit permission to put the cache here.
You can access it without treading in the garden, and you just need to find the key to the answers! It's right there...!