(page 2 of 4)Photo by Robert Sheetz/Courtesy of All Island Timeshare RentalsHigh-end timeshares, such as Ko Olina Resort, often include luxury amenities such as outdoor dining, walking paths, spa treatments, golf courses and other services.In much the same way that hotels rate the times of the year as ???peak season??? and ???off season,??? most timeshare resorts color code the year???s three seas