My friends turned out to be free this evening so they came over and we played another scenario of Gloomhaven, this one being the boss fight of the previous scenario, basically. This one went a lot smoother, both because we were more familiar with our ability suite (although we all mixed in a X-level card or two in place of something in the default level 1 set) and because we didn't get ganked by a turn one six-enemy charge right off the bat. Just cursed.
We opened with a round of disabling effects on the first set of enemies, whittled them down quite a bit, and then dared the central chamber. We proceeded to gang-tackle the boss as best we could while his archer backup pinged first our summons and then eventually us over and over and he let out rooms full of slow but dangerous zombies. I finally managed to tag him with a Wound status (which does damage every turn) and that finished him off right before he would have opened the final room. Then we did our best to focus down the archers while picking off zombies from range, and on the very last turn I darted in and nabbed the map's treasure chest. Very satisfying.
At this point it became clear how you'd have multiple adventuring parties working the campaign, because we have three different scenarios available to us next and I imagine options only multiply from there. It also took probably an hour less overall and we still haven't quite gotten it organized (although I have some zipper bags coming in the next day or two that should help), so we will hopefully get that down further. We could have pushed for another scenario but one of my friends had some other stuff he wanted to do with his evening so we packed up for now. I am sure we will revisit on Wednesday.