A fanny pack, or belt pack is more comfortable if worn on a hip or in front.
I travel pretty light turkey hunting and have been using a Hill People chest pack the last few years. I only use mouth calls, no box calls.
https://hillpeoplegear.com/Products/CategoryID/1/ProductID/193On rare occasions I'll use the chest pack AND a belt pack.
https://hillpeoplegear.com/Products/CategoryID/1/ProductID/129