I regularly carry an Ameristep Doghouse blind and a directors chair in my vest. The blind fits in the game bag, and the chairs slides in between the game bag and the vest seat cushion, supported by the straps that attach the seat cushion to the vest on the bottom, and on the sides by the straps that hold the seat cushion up when walking. I have carried it this way many times up to a mile into my hunting area, and then out again. Of course, when I kill aturkey, I have to sling it overmy shoulderto carry it out.
Since you are bowhunting, I would suggest one of Ameristeps archers chairs.