Will be arriving on Christmas Day and staying in a condo at Ko'Olina. It will be my husband, 2 daughters (11 & 15) and I. We've visited Kauai and Maui many times but this is our first stay in Oahu and our first trip over Christmas break. Any suggestions for a good Christmas dinner or buffet would be great. Also, what to expect with the crowds over what I'm expecting is a busy time! There 9 days and I am planning to have us visit the museum/memorials at Pearl Harbor, hike Diamond Head, the North Shore, snorkel somewhere?, Waikiki and maybe Polynesian Cultural Center. Open for tips and any suggestions from those of you who are familiar with Oahu.