Last year I called in May for a vacation 2 months later in July. I was very fortunate and stayed on the big island of Hawaii. The resort wasn't up to Disney standards, but I was still very happy to go. Probably if you book at early as poosible, you will have a better selection. Also. I have been on a waiting list since last summer for one of the Marriot resorts for this year the week of July 4th. Probably not going to be successful with that trade.