Waltham Amateur Radio Association posts on its web site:
On Saturday, June 23, 2018, WARA will combine a club picnic and a four-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, and water. Attendees may optionally bring other food items to share.
The FD operation is very laid back, and everyone is welcome to operate.