I'm absolutely up for this. Of the nearby stadiums, I think Philadelphia is better than NE, though I actually thought NE was a pretty nice place to watch a match last night if you ignore the empty third deck above you.
In terms of places that are slightly farther, I would love to get to Montreal having had conflicts both last year and this. Orlando is a fantastic environment even in a football stadium, and should be even better next year once they move into their SSS.
In terms of other East Conf stadiums, I'd probably rank them Toronto, Columbus and Chicago in that order.
I'd love to get to some of the west coat stadiums as well, though I would probably support staying more local if we are only doing one trip to try to maximize participation.