The last time I was in Bangor was in 2016. My wife and I drove from Portland to a Waterfront concert. It was "meh" enough that we've had little interest in returning. I recall the "security" process/policy being pretty draconian for an outdoor venue. To be honest, I'm a little surprised they are still finding people to fill it up. I would much rather go to Boston or Gilford, NH for a concert.