DeftDuck

I found out today that I got an RPA slot. There's a lot that can happen between now and the completion of IFS, but I'm looking to see if anyone can provide some more insight to my situation. I'm stationed overseas (PACAF) w/ a DEROS in Jan '15. I have three dependents (spouse, kids). I'm just trying to figure out where a PCS fits in... At what point (from IFS, to RIQ/RFC, to FTU...) do I have to uproot the family and deal w/ HHGs?