Flights, luggage & travel disruptions

Can flights in Greenland depart earlier than scheduled? Can I bring a drone to Greenland? Can I bring camping equipment? Can I bring food into Greenland? Can I bring hiking equipment? Can I bring skis? How common are weather-related delays? How early should I arrive at the airport? How much luggage can I bring to Greenland? Should I leave extra time between connecting flights? What happens if I miss a connecting flight? What happens if my flight is cancelled because of weather? What happens if my flight is delayed?