Weather at the field. Cameras at the field.
According to Gateway Compendium
Operating any type of drone is prohibited within the boundaries of Gateway National Recreation Area.
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AMA Communique (2)
“We have long held that federal registration of unmanned aircraft systems (UAS) makes sense at an appropriate threshold of weight, capability and other safety-related characteristics. However, federal registration shouldn’t apply at such a low threshold that it includes toys. It also shouldn’t burden those who have operated harmoniously within our communities for decades, and who already comply with AMA’s registration system.”