If planning to park hop, you might consider rope drop and no FPs at DHS and using your 3 FPs at Epcot in the afternoon. The problem with this plan is that there are fewer attractions at Epcot that warrant using a FP. Still, on a busy day, using FPs at Spaceship Earth and Mission Space can be useful. So you could get one for Soarin', Spaceship Earth and one other attraction and make your afternoon in Epcot run more smoothly. Otherwise, if you hop to Epcot with no FPs, you could find yourself doing nothing in Future World. Or waiting in 75-90 minute lines.