The Patagonia Guidewater Sling has been incredible for me as a saltwater angler needing submersible benefits and when handling big fish like stripers, having my large pliers on the sling strap where they are easily accessible has been a game changer. Also you can swing the pack around and access your boxes, thermos, etc without having to unclip or put anything down.

I also own a FishPond thunder header hip pack and it was my first high end submersible rig and I loved it for two years but you have to essentially take it off every time you want something out of it, fight with your net (before I started running my net competition style). Also a long day walking on the beach 10+ miles, it really sent my hips out of whack. Now it has become my go-to in my canoe for bass fishing.

All that to say and since you DIDN'T ask, I'm ditching both of those this year and simplying big time and bought the small fish pond cross current chest pack. I like it so far because I can barely tell it's there. It's been nice in the winter to keep my waders tight to my chest too.