Recently got exposed to Fishpond/Orvis fishing gear packs at a fly fishing show. After looking at these at the show and on the internet there seems to be a wide variety available.

Does anyone have any experience with using any of these types of gear bags out on the streams/rivers ? Does anyone have any preference between the chest type packs and fannypack type ?

I'm considering getting one to carry my fly gear. I'm looking for one mainly to carry gear for day outings.