I don't think it's crazy but then again I have never ate there before....we have an ADR at Tony's for MNSSHP but I am thinking about going switching to park fare.
You do know that you are allowed into the MK at 4pm on MNSSHP.
Is there any chance you could get an earlier dinner? One thing I heard was to ask for the bill right away (as you are seated). Then you are not waiting around for it.
I don't think that's enough time. If I were you, I might try showing up at 1900 Park Fare early (like maybe 5:00) and ask if they could seat you early. It might work and it might not, but it seems worth a shot.