I'd head straight for Na'vi and get a FP for FoP. Unless you're committed to being at the turnstyles at least 45 minutes prior to the start of EMH, you may got mobbed on your way to FoP and since you're talking about swap, I assume you'll be doing the mad dash with a young child. I'd save yourself the angst and just to Navi standby which should be a fairly light wait and get FP for FoP.
Never tried to use RS during EMH but don't see why they wouldn't allow that like any other time.