https://rockdalecountyga.gov/about/company-history/county-departments/recreation-and-maintenance/costley-mill-park/ Scroll down for "Park Hours" They change with the season.
Yes they have grills, for a extra charge i believe. Big area for a party and they have a schedule so u have to call to check
I'm not sure how long they're open but they do have a covered section by the lake. They also had a covered section by a play ground. Not sure if there was a grill or not. We brought our own.You may have to call and reserve either area. I believe my video shows the sign with times and who to call.
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