Spring break will be packed. FIgure out how to use Fast Pass for your fave rides, and dont plan on seeing/doing everything if its just one day. Try NOT to go on Friday.
Ive seen Aladin twice, both times were good seating- just walked in.
Just went last week to preferred seating for WOC. Had dinner at Wine COuntry to get the seats (Actually its all standing) and it actually seemed like the show was better from farther away. Again though, you'll be in a huge crowd.
Cafe Orleans (NEar Pirates) has walk up GOOD FOOD. If the seats are all full you can take your tray and sit on the walls around the water. Handy if you happen to miss your ressie at a sit down.
Im sorry to say that if you plan to stand in line to see many characters you could end up using your whole day doing that.

Id pick my kids top choice and just do that, and be thrilled if you bump into others.
A tip of mine: If you have little kids and are in the park when its PACKED use the train and cars to move around as much as you can. Walking in that crowd of people trying to hang on to tiny hands takes some time.
Have fun!!