The Resort Monorail normally runs until 1 hour after the MK's regular closing. On EMH nights, transportation to the MK resorts is provided by boats and/or buses.
Currently, on
MNSSHP nights, the Resort Monorail runs until 1 a.m. If you manage to miss the last monorail, buses always operate until the park clears, and I'm sure a bus ride to the Poly would be provided if necessary.
Monorail hours are always subject to change, and last year, the Resort Monorail closing policy for party nights did change -- more than once,