We have been a few times, I would agree with PP’s wait a few years, the first time we went our two were 5 and 4, it was really hard work to be honest. Long flight and coming back overnight wasn’t fun!
If you do decide to go, the advice I would give, is to stay up as late as you possibly can the first night, make sure you eat, you probably won’t feel like it but if will help your body clock adjust and save you waking up in the early hours.
If you want to take snacks into the parks, remember only individual portions are allowed so no family packs or large packs of biscuits etc. You can refill water bottles etc in the parks.
Comfy shoes are a must, you will cover miles.
Easter is a lovely time to go, but busy, US Spring break etc. Won’t be offers as demand is high that time of year.
We like universal, it’s a long way to travel without doing all the parks IMHO.
With a young family a villa would give you more options. I would definitely choose that over a hotel.
It’s a great holiday, but a very tiring one too. Eating out is good value.