Hi. We have been to Disney 3 times in 3 years and are planning for either Feb. or April next year. Have been doing alot of research! Peak season starts Feb. 15 and if you call and ask why they say because of varying Spring Break dates. Through further research, we found out that the Daytona 500 is February 18th (very crowded before and after), Mardi Gras is February 20th, very crowded that week! Going in to March does start Spring Breaks, but I don't have the website you are referring too. Spring Breaks will end the weekend after Easter which is April 8th, with peak rates stretching through April 15th. You could go right after, but keep in mind MK closes early on Friday and Saturday last week in April and first week in May for Grad nights, which bring LOTS of teenagers to the park!