Eliot Mayer, W1MJ, writes on the wara64 mailing list:
On Saturday, June 22, 2018, WARA will combine a club picnic and a 4-hour operation in the ARRL Field Day.
Time: 12:00 – 6:00 PM
Location: Sunset Shelter, Prospect Hill Park, Waltham (near the repeater site)
The club provides hamburgers, hot dogs, buns, condiments, plates, napkins, etc. Attendees are encouraged to their own (non-alcoholic) drinks and a side or snacks to share.
The FD operation is very laid back, and everyone is welcome to operate.
To learn more about the ARRL Field Day, see http://www.arrl.org/field-day.