Are you a Marriott Vacation Club owner? If you are, then check for availability directly with the resort and try to get the owner rate.
If you are not, hold onto those 3 rooms! With Easter Sunday on April 4th, the 2 bedroom villas will be in very high demand. The only way to get one is via a cancellation.
Keep in mind that MVC generally has check-ins Friday, Saturday and Sunday. Owners will occupy 8 days 7 nights especially in Hawaii. Some MVC resorts have expanded check-in dates to include Thursday and Monday, best to check with the resort directly.