The venue is Scandic Nidelven in the center of Trondheim, close to the central train and bus station where trains and buses from Trondheim Airport Værnes will stop. Please see the airport pages for information on how to get to Trondheim from the airport.
There are numerous hotels in the center of Trondheim. For a good overview please see your preferred hotel booking app. Trondheim also has a nice hostel in walking distance from the venue.