Q: The event page says BBQ and Registration at community center, but the location of this community center does not appear on Google maps?

That is correct. It is a little hard to get a link to that specifically on google maps because that building is part of the park. The community center is to the north of the football field and city pool in the park. Hint: look for the old cars. Here is a link to the entrance of the park. Go north and take the first left PAST the football fields.