Do You Need a Christmas Event Too? Event Cache

I'll be in Chino Hills looking for a regular sized cache on Christmas Day afternoon, and since I've never attended an event on Christmas, I thought I might host a quick event to give others the opportunity to go to one as well. There's a big picnic shelter at Grand Avenue Park at the east end, and two other sheltered areas near the driveway and at the west end. We'll try for the picnic shelter with the other covered areas as second and third choices. The main entrance to Grand Avenue Park is (unsurprisingly) on Grand Avenue. This is one of Chino Hills's gated parks, and I expect the gates to be open on Christmas Day. In the event that they are not, we'll meet at Terrace Park in the neighborhood SE of Grand Avenue Park (waypoint provided).