The Milky Way and a Photo Workshop - Acadia NP

On a whim last weekend, we drove up to Acadia for a night.  The weather report looked decent so we took a chance.  The weather was just perfect.  The sunset was nice though a cloudless sky does not make for great images.  We waited for darkness as the moon went lower on the horizon and the stars appeared.  Not much waiting and we started photographing the Milky Way.  It is amazing how many cars just hang around with their headlights on (just perfect for astrophotography).  Folks running around without a care - so what if I hit your tripod - I did not mean to - it just happened.  We managed to get a few shots and a panorama that I will post later.We decided to come down Cadillac Mountain and head for Boulder Beach to photograph the Milky Way with the boulders in the foreground and Otter Cliffs as an anchor on the right. As we approached the walkway to the spot where you climb down, we met two photographers. Strangely there was a lot of shouting from some people down at Boulder Beach.  They were yelling about lights and how they were doing a workshop etc. - extremely rude.  The two photographers who were up on the walkway indicated that the workshop leader asked them to leave Boulder Beach as he was conducting a workshop. Excuse me - this is all a National Park and we all have a right to be there.  As a workshop leader, these people need to be considerate and courteous to fellow photographers - not be nasty and rude.  Based on this feedback Monica and I decided not to go down but shoot from the overlook above.  You need a light to get to the overlook so as Monica started toward the overlook the shouting started all over again.  She was rudely told to switch off her headlight - now must one walk in the dark and risk a fall?  There is a way to accommodate other photographers in situations like this.  Give them space and the time to set up, it is a public place after all.  There is enough room and the stars are not running away.  I did look up to see who it was that was conducting this workshop, I don't know him, but I hope he learns a little photographer's etiquette.Here is an image captured from Park Loop Road: