About when I thought that the modern stuff was starting to sound samey, I found this gem. The piece is Charpeniter Fantastique by Paul Archibald (commissioned for the event) and it's far more classical and structured than almost anything else on here. Gabor Tarkovi is sitting in on the end on piccolo trumpet. He's really soaring all though the piece.
The addition of organ, piano, timpani, and trombone adds to traditional feel of the piece, but it's got some modernisms thrown in for good measure. The augmentation of the theme (featured at the end) screams "Simple Gifts" to me. There's some crunchy chords towards the end as well and I'm certain at least some of them are on purpose.
Sadly, I couldn't find anything else about this event online. There are a couple other recordings from this particular performance, but not evidence of previous years or a website that talks about the Brass Weekend.