If your wife is like mine, she won't be calling and she won't be carrying calls. She doesn't need to pack a suitcase full of junk. I typically carry everything needed. The most she' packs is gloves, facemask, a few shells, and a license, maybe a bottle of water. My wife typically needs something to sit on and a few pockets. I'd be more concerned with making the hunt somewhat comfortable with a good seat/cushion and not so much how much she can carry.
