I decided this year to try a bandolier style and so far, after 25+ days afield, I am pretty satisfied. A couple things I would probably change but it's definately cooler than a vest and everything is really accessable. It can be a little bit unwieldy and noisey when moving through some thicker areas but probably no worse than a vest. The seat has a strap that you can just put over your head and the seat is folded up and out of the way when moving.
I also carry an extra cushion with me (Primos Deke Seat with backpack straps) since I can run out of butt patience pretty quick.
Here is a link to the website and a pic of the one that I am using (sort of... this one is a little different)...
http://www.little-bighorn.com