The “Laie Beach Retreat" is located in the town of Laie, which is approximately 45 minutes from Honolulu Airport on the north shore of Oahu.  Laie is home to the Polynesian Cultural Center and the BYU Hawaii Campus.  Please see the following link for directions to Laie:

Directions to Laie provided by BYU

The below photo is an aerial view of Laie Bay - where the Laie Beach Retreat is situated.  Laie Point is the peninsula at the bottom of the photo.  Goat Island is seen at the top of the photo as well as Malaekahana State Preserve.   The Laie Beach Retreat is between Laie Point and Malaekahana.  The Mormon Temple and BYU-Hawaii can also be seen. 

Yahoo map of the Laie Beach Retreat Location:

Map of Oahu - Laie Beach Retreat is where red star located.