Thinking about going down from Boston too! I just moved here and the way to say "in force" makes me wonder if there is a local group or even subreddit I can look into to help with this cause. Slightly OT but I have also been curious about "meshnet" groups in Boston, have you heard of any?
If you RSVP on the site and put in a Boston zip code, you'll get information on how to link up with other people heading down from Boston. I know Restore the Fourth Boston is having a meetup in the next week or so for folks interested in the rally.