Fuji-Q Highlands in March?

I'm planning a trip to Tokyo in the last week of March, and thinking it'd be fun to visit Fuji-Q Highlands as a day trip. I've heard many reports that the lines can be very long - but they all reference Summer hours. I'm looking at a Thursday in the last weekend of March. Does anyone know if the park will be super busy with long wait times during that time? Thank you!

In Japan, also spring breaks of schools, so it is crowded even on weekdays,
but many Japanese students and families go to TDR(TDL/TDS) than FujiQ usual,
so it may be surprising that there are many foreigners.
If there are indications that cherry blossoms will bloom earlier in mid Tokyo, waiting lines may be longer.

However, It depends on weather condition, around late Mar is not flat,
some days very strong cold airs coming like this, so not so rare.
https://youtu.be/NDP-SbmbvDo
Watch the one-week weather forecast at last Fri.
http://www.jma.go.jp/jp/week/321.html