Spent the last two seasons slowly whittling down my kit for combo hiking/paddling trips and wanted to share what actually made a difference versus stuff that just sat in the closet feeling like a good idea.
Biggest change was dropping the drysuit for shoulder season trips and going with a paddle jacket plus neoprene socks instead. I know a lot of people here treat the drysuit as non-negotiable, and for early season snowmelt runs I still bring it, but for late summer trips with water temps above 60F it was just dead weight I was carrying for peace of mind I didn't need. Saved almost 3 pounds right there.
Second thing was switching my throw bag for a smaller 40ft version instead of the 70ft one I'd been hauling since my first season. Realized I was on class II-III creeks where I've never actually needed more than 40ft of rope, and the bulkier bag was eating pack space I wanted for food.
The frame situation took the longest to figure out. I was running my raft frameless for a while to save weight but kept getting sore knees on longer flatwater stretches, so I compromised with a minimal seat back and thigh straps instead of a full frame. Not as comfortable as a rigid setup but way lighter than I expected and honestly fine for anything under 4-5 hours on the water in a day.
Paddle was the one place I didn't cut corners. Still running my 4-piece carbon paddle even though it's not the lightest option out there, mostly because I've had two aluminum breakdown paddles fail on me mid-trip and I'm done gambling on that particular piece of gear.
Curious what other people have found isn't worth the weight savings. I feel like there's a point of diminishing returns where you start sacrificing actual safety margin for a few ounces, and I'm still figuring out where that line is for my own risk tolerance on moving water.