For the past 5 years, I've been using a mondo, gigantic, supersize fanny pack that was designed for rock climbers, so it can carry 5+ lbs of gear/fish. It has spare handles so you can carry it like luggage. It has two beverage carriers on the ends. Zippers are well made and have not stripped or otherwise malfunctioned. There's a very large main pouch, an inner pouch, and an exterior pouch in addition to the beverage carriers. The belt is well-padded.
At the time, it was the biggest one that REI sold. I think Mountainsmith is the brand.
[edit: it's most like the Waterdance Guide Pack on the fishpondusa site in the initial post.]
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Criteria:
My fishing style is to hike along smaller streams, fishing intensively, often several miles in one day if the daylight holds out. Typically I won't wade above my thighs, but if I do go deeper, being able to sling the bag over my shoulder would be desireable. I needed a way to carry trout, lures/bait, maps, small flashlight, lunch, water/pop, and not have all that stuff on my shoulders or in my hands. Had to be one bag so I wouldn't be likely to leave something behind.
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Consideration:
Chest packs and backpacks will keep your body warmer. Not a desireable feature if you're fishing in the summer, could be useful if you're fishing in the winter.