Pretty sure you can but call their office to be certain 540-368-5019, they open at 8
I don't think there are any restrictions against drones. One guy often flies, and lands, a paraglider from here.
I have seen a couple of drones being flown there but I'm not certain if that is a legal practice at Pratt park. I would suggest that you ask the park manager before you launch your drone. You'll see him at the maintenance shed or on power equipment.
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