I suggest parking across the bridge and taking a bus or jitney across the bridge.
Not there own
Broadway between 182 and 183 is your best bet.
Nothing closeby
Parking in that neighborhood is nearly impossible.
They have a sign encouraging you to park at Castle Village Parking 212 Cabrini Blvd. Don't know if that means they validate or what.
Thanks! Your answer is awaiting moderation.