We went the 7-14th of March this year.....this was the early stages of "Spring Break" & the crowds were pretty big. Easter was in April this year but the week prior & the week following Easter is very, VERY busy.
The Matterhorn was down during the week for brake testing, the King Arthur Carousel was down for a few days during our trip & the King Triton Carousel was down all but the first day. There will be some things down...but who knows what.
The weather was comfortable 70's & low 80's with the evenings cooling off quite a bit.
Next year Easter will again be in April, so early March won't be super bad....but always plan for crowds. Our best days were Weds & Thursdays. Go early, collect FP's, rest in the afternoon & come back in the evenings & you'll have a great time!!
Our very long trip report has a link below in my signature if interested.