We are going from March 12th to the 22nd next year and it will be busy due to our Spring Break up here in Canada. Mind you, not all of Canada is on Spring Break, but a good chunk of it is. You mix that in with whatever U.S. States are and it leads to pretty busy parks.
We have been 3 times during the middle of March and we LOVE it. Weather is usually perfect and the parks are still very manageable, if you utilize fast passes and EMH and the likes.
Have fun!!! :wave: