Generally speaking, the wait time is very long. I was in WDW last March and all the FPs were out by the early afternoon. Perhaps some can take advantage of multiple rides using EMH, making Soarin' their first ride of the day after rop drop and then get FPs later on but trust me, if you're not in Epcot in the morning, you're toast. All the FPs are out by early afternoon and the standby lines can be from 90-150 min long for the rest of the day! We're not talking Christmas or any holidays. I'm speaking from Spring Break experiences. Not as crowded as Christmas or Thanksgiving but still packed regardless.