A car is useful for parks other than MK. If you intend to have dinner at any restaurants make your reservations months out and for character meals the full 180 days out; failure to do so means you will not eat at any such places. If you are thinking of eating a dinner meal at a counter service restaurant in a park plan for long waits, lines during mean times can get to 40 minutes or more and once you get food, you can sometimes find there are no open tables.
Crowds will be huge. Soarin can reach 3 hour stand-by line and Test Track won't be far behind and that impossible level can begin by mid-morning and stay that way all day and evening. If you really want to do popular rides, go early in the morning. Fastpass becomes a necessity about an hour after a park opens and fastpasses for popular rides for the entire day can be gone by noon.
Things you would never think could have huge lines get them, such as Tree House which can get to a line well over an hour in mid-morning. At MK, except for the mountains, Peter Pan, and Pooh, you can get lucky beginning about 4 in the afternoon as rides, such as Pirates, which had two hour lines at 11 can have very short ones between 4 and about 7. After 7, a huge onslaught begins again and everything gets huge lines. At Epcot, things other than Soarin and Testr Track can be fairly easy after 3. If youenter the park oin the morning and see an impossible line at Spaceship Earth, come back at 3 and it will a walk-on. Its problem is that it is the first thing everyone sees when they enter in the morning and everyone heads straight for it causing huge line. At AK, most things can be two hour lines in the morning and fairly short at 5 except Everest which is always long. At studios things other than Toy Story, Rock n Rollercoaster and Tower. can also have much shorter lines in late afternoon while having huge ones most of morning and afternoon.
One thing that also gets very huge is the street crowds. Enter MK at noon and stand at base of Main Street and you will a sea of humanity bobbing up and down all packed next to each other.It can sometimes take a very long to walk from one end of park to the other beause streets are so crowded so head somewhere early for any reservation. If you have to see a parade, I would just wait to last minute and find any space you can that is elevated, like a place where stairs or a porch is; if you want to try to find a good spot early just be aware that people start doing that during Easter time beginning about 2 hours before the parade.
Pools at hotels can get overpacked and you have far too many who try to claim a table with towels and articles in the morning who then don't return for hours. The waterparks of warm enough (usual) often reach capacity by 11 and thus close to new guest until about 2:30 when they open up again. If you actually want a chair or table at a waterpark that is not directly in the sun you need to be there at opening.
Diseny does not do Easter like Christmas so don't expect huge amounts of holiday directions. You will see some and resorts often have egg hunts and crafts on Easter and some have the bunny show up. A few restaurants have Easter brunches (reservations long in advance needed). Otherwise it is like any other spring break time except for the much larger crowd. Consider avoiding MK on Easter. Everybody goes there on Sunday under the belief that something special must happen there on Easter that does not occur other days of the week --it doesn't. Nothing happens at MK on Sunday that does not happen other days of the week. You will usually find MK super crowded all the time all days. AK and Epcot usually have their lightest days of the week (that is relative since nothing is really light) on Easter and the day before; Studios is usually best on Easter. As noted MK is impossible on Easter; it is the same on the Monday after also.
