Tim,

The answers so far have been very good. The one thing I would encourage is for your group to also do an honest assessment what occurred. Were there pilots in your group buzzing hikers? Yes, it is fun to show off and great to wave at hikers, but in a National Park you just maintain a reasonable distance and avoid pointing gliders directly at people. There is almost no reason to be that close to a ridge that a legitimate complaint would be made..

Others have suggested a dialog and I would encourage you to act as an ambassador for soaring. Meet with the park ranger to understand the concern and make sure your pilots are being respectful of all users of the area. Not everyone enjoys a fast moving object flying near them while they are out in nature.