Yeah, that's why turkey vests ( and EVERY turkey hunter needs one of those things, no kiddin') have so many pockets, to load up w/ calls.
One trick w/ pot or slate/glass calls is to have multiple strikers. Easy to carry and a different sound for each. I like mouth calls as well, and one can tote a bunch of those easily. For the price though, I spend to much on mouth calls that I simply cannot get good sound out of. I've got a couple of good boxes, but do not hunt them anymore., to darn clunky and big to suit me. I've also got a wingbone or two that are different and easy to carry.
One of my secret weapons is a gobble tube, but you've got to be careful and use good sense w/ one.