Check out these ideas out to keep that from happening.
Yes, a major part of dry wrinkly hands, is what happens from hard work, sun and aging. And, don't get me wrong, I am a supporter of aging gracefully, but on the other side of that, I will always suggest taking the best care of your skin as possible.
This is something you can do at home. Steam them!
Boil water on the stove and carefully hold your hands over the steam, you can even try putting lotion on your hands first. Moisture on them helps to keep, well, moisture in your cells, ensuring that the cells have water to keep them thriving.
You can put a tablespoon of fine ground sea salt into a dish with a teaspoon of oil. Mix that up and gently rub it on your hands - a light easy exfoliation of your hands.
Try exfoliating first then steaming them - perfect for your wholistic health.
Ensure you have enough water in your system too :)
And, if you are in the area then stop by the boutique. I have a steamer just for your hands and lots of yummy lotions to put on them first!