If you are flying in, you will likely eventually land in this order:
1. Toronto Pearson International Airport (YYZ)
*You will likely have a few hours of layover in this airport before going on a plane to Sault Ste. Marie.
2. Sault Ste. Marie Airport (YAM)
Great little airport. When you arrive it is 30 min drive to downtown Sault Ste. Marie.
Link to map image/directions above: https://maps.app.goo.gl/GsBj9bZEmfwwhLf59
Other Airports
1. Chippewa County (CIU) - Sault Ste Marie, Michigan (U.S.A)
If you're traveling from Detroit, Michigan or Minneapolis, there are round-trip options available between Detroit Metro (DTW) and Minneapolis-St. Paul (MSP).
Driving from Chippewa County airport to the event is about a 40 min drive which includes crossing the International Bridge border (going through customs and paying the bridge toll) into Canada.
Link to directions here: https://maps.app.goo.gl/bfrCqhPxLd7K1yFv5
General information in regards to driving from major nearby cities:
1. Toronto to Sault Ste. Marie is about 8 hours by car.
2. Chicago to Sault Ste. Marie it is also about 8 hours.