Can you use a mouth call? If you can, any grunt tube will work. How much tube do you want to carry? I use a Hunter Specialties tube, it is about 20" long and has no bell on it at all. It wraps around my body so I can move, call and shoot my bow and doesn't get in the way. I don't have to put it in the pack!. I use a mouth call that has 3.5 reeds, big sound! If you can't use a mouth call let me know and I will tell you how. If you can use one, talk to Elknut1. Buy his tapes to practice with, they are very good!
www.elknut.com You have plenty of time to learn. Let me know how I can help.
Gselkhunter