I used to be an authority on crack creams (yes, there's a joke there) from Zim's to Boudreaux's Butt Paste (and another), but have since learned that preventing cracking beats pee out of treating it. Any good hand cream, from Intensive Care to Bag Balm, does wonders if used early and often BEFORE cracks start, as does keeping hands dry and from wind burning when handling decoys or wet birds and driving the boat. I've found nothing better, or handier, than cotton lined utility gloves like these for those chores:
That thin lining does a surprisingly good job of keeping cold from transferring through the rubber, but cheap Army surplus wool liners worn underneath makes a combo about as warm as anything out there. The cuff notches were cut to make slipping them on super quick and easy, so there won't be temptation to skip doing so when accepting wet birds from the dog on frigid mornings. And they're cheap and compact enough to keep pairs handy most anywhere you're apt to want them.
If you think I'm wrong, you might be right.