I like the sealskinz too. However, I have only used them when fly fishing for Pike so its large barbless hooks. Not sure how they would be with small barbed flies?
Many years ago when I used to do a lot of boat fishing for Cod, I would wear a pair of the blue food/surgical gloves on my hands, followed by woolen gloves, The blue gloves kept my hand dry and clean, and I could still tie knots etc, and the woolen gloves gave a bit of warmth but could be whipped off when a fish needed unhooking.