Treat it like drone regulations where it’s illegal to launch a drone from a national park but not illegal to flyover.
Launch fireworks from outside the park and over Mt Rushmore and preferably in the form of a middle finger
It’s all Black Elk Wilderness for a long ways.
Custer state Park is like 5 miles away and heavily forested.
Just call the Ziolkowski kids and say please to a display from their monument