Multiple Instruments in one session

[Draconistarum]

Should someone play different instruments in the same practice session? The mouthpiece and instrument for concert season is radically different than the one for marching season. I need to make sure I stay proficient on both. Should I practice on both at the same time or alternate or just hope for the best during each season?

[Vortex]

Why on earth not? Could you maybe name which instruments?

If it's something like alto sax and Bb clarinet, maybe not b/c your embouchure would get tired faster and you wouldn't be able to play either for as long as you might like. But if it's sax and a brass/string/flute/dbl-reed instrument there's no reason you can't.

[Draconistarum]

The three instruments I need to practice are the Eb contrabass clarinet, the alto sax, and the Bb clarinet.

[Fini]

why couldnt you? i play sax and flute, and tho theres a slight weird feeling for a few seconds after if i switch from one to the other, theres nothing wrng with that