There's nothing saying you can't smoke, so I'd think vaping is fine. I do both and like to be respectful in parks to go away from other people and not leave anything behind.
I can't find anything on the web specifically banning vaping. I think as long as you do it respectfully and not in the faces of young children young families with children etc in mind your vapors you shouldn't have a problem. Remember it is a community resource. Vaping is not that intrusive but I would minimize its visibility and effect on others. Please enjoy the park it's beautiful. And let me know if you find out anything specific concerning vaping.
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