You'll know where you're going for follow-on the day they tell you... It's been the day you class up for API or the day you complete academics previously. Be mentally prepared to move in as little as two weeks notice for each phase of flight school. Unfortunately many spouses find themselves along for the ride and under employed while their spouses are in flight training.
If you want to play it safe move near whiting and commute to API... 50/50 shot you'll move. If you move to the back gate to perdido, 100% chance you'll move as long as the property you live in is outside 35miles from whiting (double check Florida military clause).