I love this website to help me research festivals that are going on in my area for the summer. Hope to see you guys at some of these! https://www.jambase.com/festivals
Some that I might check out . . . (more will be added as the season ramps up. Last year we did Festival on the Farm and it was great for the family.)
Boston Calling - not your typical festival but so close might just drive back and forth for who we want to see.
Levitate Music and Arts Festival - We aren't sure because it's at the end of our vacation and getting the kids home late on a Sunday night isn't easy . . .but it's still on my list!