Bus and train schedules:

Saturday June 27: 

Bus from Port Authority to New Paltz (Route 87),  (usually leaves from gate 30-32)

Takes about 1.5 hrs. Suggesting buying a ticket ahead of time. 

trailways.com

12:30, arriving 2 pm

2 pm, arriving 3:30 pm

3 pm, arriving 4:30 pm

(15 min Uber to Villa Isis,618 Plutarch Rd.)

Return New Paltz (Route 87) to Port Authority

Leaving 6:10 pm, arriving 7:40 pm (last bus)

Train from Penn Station (Moynihan Hall), off peak times to Poughkeepsie: 

12:56 pm, arriving 3:06 pm ($28)

1:20 pm, arriving 2:45 pm ($49) 

2:19 pm, arriving 3:42 pm (28)

3:15 pm, arriving 4:38 pm ($24)

(20 min Uber to Villa Isis, 618 Plutarch Road)

Return to NYC: 

6:56 pm, arriving 8:51 pm ($28)

7:36 pm,  arriving 9:16 pm ($49)

8:40 pm, arriving 10:15 pm ($24)

8:58 pm, arriving 10:55 pm ($28)

Last train from Poughkeepsie:

9:57 pm, arriving 11:55 pm

*Note that all prices are estimated based on the information available when collecting the data)