That's when you need a Combat Clarinet. A plastic or hard rubber beast that can withstand the most extreme environments: hot, cold, and smoke machines.
My recommendation is to get an old Vito V40 and put it into adjustment.
According to some internet the sources, the Vito V40 was based off of the Pete Fountain model, making it an ideal horn for a large bore jazz clarinetist. Invariably the keywork will need some adjustment for each player--it's nowhere near the quality of a vintage Selmer or pro level Leblanc, but the sound of these horns with a good mouthpiece is quite beyond your average student model.
The sound is consistent from the top to the bottom. The clarion is centered, with a compact Leblanc tone, and a very responsive, neat altissimo. Most importantly, the intonation on these horns is very good. Projectionwise, these aren't as powerful as a good Selmer, but they do have considerable 'jump' to them.
Don't be caught when that call comes in from Green Bay next winter. Line up your Combat Clarinet.