I've worn waders for 40 years, Simms, Patagonia, Cloudveil - all guide grade. None of these would be my choice for paddling - they're bad enough when you have to drive the truck from spot to spot.
Last year, picked up some Kokatat Tempest dry pants.
Come in 2 grades of breathable, Goretex or Hydrus, and of course the goretex are spendy.
They have built in socks, but thin, not neoprene like stocking-foot waders.
They come up to about mid torso, and while they're more snug than waders, they wear like clothes, and are very comfortable sitting in a kayak.
There's room for warm socks, base and insulation layers inside.
Add insulation layers and a wind shell on top, and you're set. here's a forum search with 49 posts for "dry pants"
- not all fit, but there are enough that do
when I searched Kokatat pants, other forum members wearing these include Chubbs, rgv_cap10 , AlanC, mpg2yahoo, Jigawatt, quincyraybon, Kayak Kid, SOUTHWESTPADDLESPORTS, The Nothing, back to 2009...
If you need gloves, I like fingertip gloves, and either neoprene or merino wool will keep you warm even if the gloves get wet.
Synthetic fleece gloves turn into a cold air conditioner when they get wet.
I've caught rainbows at 14-degrees wearing these Filson merino gloves
A few weeks ago in the 2am 40-degree windy chill at Arroyo, was wearing my neoprene Pelagic fingertip gloves.
They were very cozy, even if I put them on cold and wet, they quickly warmed up.
Also easy enough to clean fish slime - if you wear merino, take them off before handling fish.