I play in this event every year, along with my wife. We play at a new big market (400 or so booths) in a nice airy glass atrim on the 2nd floor. That poor stressed concrete mezzanine gets vibrating with 20 tubas 20 euphs and 20 baris, a few serpents and a sousaphone or two.

Anyway if you are looking for multiple part christmas carol arrangements (for horn?) here at a Canadian Music Education site:

http://musicmakesus.ca/celebrate/tubafest/

Print out the parts and find some horn players.

John Conley
Musica est vita