You can reserve as long in advance as you want. For example, for New Years Eve 1999, guests started reserving as early as 1989. What you don't get by reserving real early is a locked in price and you will not be locked in until closer to the date. Moreover, discount prices, like those you find with codes published at mousesavers.com, are usally not available until 6 months or less before a date. One year in advance is usually well far in enough in advance to get anything you want except the following should be reserved even further out to assure getting them: Christmas time if you definitely want a particular resort (rooms are usually available closer to Christmas but sometimes particular resorts may reserve completely early), suites particularly two bedroom or larger suites for many times of year (these large suites are very expensive rooms reserved by people who either are Bill Gates or want to feel like it for a little while).
