I usually just carry a mouth call or three and an Old Primos Battey World Class Slate with four or five different strikers. I dont even use a vest most times. I wear one of those seats that go around your waist and you just pull it down to sit.

If I am toting a vest its loaded with calls and other stuff. A Primos Heart Breaker Box, A Quaker Boy boat paddle box, Two slates; a Battery World Class and an aluminum one, and about 15 different mouth calls. But I usually just travel light.