You really can't go wrong with a cast. Surgery may lead to speedier healing, but it isn't for everyone. Casts are a tried-and-true way of treating a fracture of the scaphoid bone, and using a cast to heal this kind of injury rarely leads to complications. You can expect some stiffness after your cast is removed, but chances are it won't last long.
Research suggests that, whether you choose a cast or surgery, you'll have about the same wrist health after two years. A recent study showed that people who only wore casts had about the same grip strength and wrist movement two years afterward as those who had surgery. And patients in both groups were equally satisfied with their treatment. So you can put your worries to rest and let your body heal!