From Logan Airport, the easiest way to Plymouth is via rental car or the Plymouth Brockton bus line which takes you a short uber ride or carpool from hotels and venue.

https://www.p-b.com/schedules/hyn-bsn-lgn-webschedule/

Via MBTA, the Kingston commuter rail line will get you to a similar distance and cut out some cape cod traffic.

https://www.mbta.com/schedules/CR-Kingston/timetable

Please factor in traffic headed south for a weekend on the cape

Please follow signs for Plimoth Patuxet Museum.

There is an entrance from Plimoth Plantation Highway as well as River street.

Your first right from either entrance will be to limited parking spots at the pavilion (some will be reserved for the buses.)

Additional parking spots are available up the hill if you follow signs for visitor parking. From there, walk directly past the visitor center and you will see the pavilion tent down the hill.