None. My husband and I celebrate the dawn on solstices and equinoxes to honour the cycles of nature. The only people who might turn up would be friends willing to arrive 1 hour before sunrise. Strangers have no idea where we are or how to get here.
However, if a stranger gate crashed any event and behaved destructively, I would expect the strongest men to peacefully escort him off the premises. If he/she was mad on ice or some such, trap and wrap him in a sheet and ropes and call the police. Take photos of the damage.