The arrowmocs bush boot is imho the best and most economical moccasin around.
http://www.arrowmoc.com/7.html It also wears like iron. You will have a hard time getting this quality of leather to start with. Yes, moccasins can be made far cheaper, but not as durable.
If you really want to make your own, then get this:
https://www.amazon.com/Craft-Manual-American-Indian-Footwear/dp/1884693008 It has very good instructions, but remember that most moccasins are soft sole models and are intended to be made from deerskin or elk skin. They will wear out really fast and you may need to combine several design until you find what you like. But this will take a good amount of work.
For example, an Assiniboine hard soled moccasin combined with an apache style boot is probably the best of both worlds, but will require a good amount of work to realize and finally fit you perfect. Then just glue the rubber sole to the bottom for non slip.
What is deep woods hunting?
By the way, the native American got bit by snakes a good bunch of times,too and most serious bites were probably deadly. But in a more primitive time, death was a far more common reality in daily life than in modern times. There was a reason to have 6-10 kids, because only 2-4 probably made it into adulthood to be able to care for you when you were old.
Even though, only 10 or so people die of snake bites each year, there are many more snake bites from poisonous snakes each year. When you see the photos of some of those on the web and you realize how nasty high the medical bills are, it is dirt cheap to get protection.
Also, some people still have some problems years after a healed bite. And especially in California:
https://en.wikipedia.org/wiki/Crotalus_scutulatus