Park Permit/Entrance Fee – This is what you purchase at the gate to enter the park. Good for 7 days.
Reservation/Going to the Sun Ticket – This is what you get online before your visit to be able to drive the Going to the Sun Road which takes you to Logan Pass. https://www.nps.gov/glac/planyourvisit/vehicle-reservations.htm
Ceremony Permit – This is what you need to fill out in order to have a ceremony within the park. This ALSO serves as your Going to the Sun Ticket/ reservation the day of your wedding