When I was a lot younger and lived in Germany, we'd buy these hiking boots made by Meindl.... We called them "freak" boots, because those of us that wore them were called "freaks" We were the Rock and Roll people.. the ones that drank, smoked and all that..
Anyway, they weren't water proof, so we'd take them and dip them into pots of melted wax... We'd buy big candles and melt them down and dip the boots into that... We'd let it soak in a bit..
Hen we'd take them out and scrape them down, and take a heat gun to them and melt the rest in.. They'd stay waterproof for months..
Just giving you an idea if you want to stay with leather..
Other wise, this is what I wear when I'm out hunting or tripping through the woods,.. No idea what others call them, but I call them duck boots.. Mine aren't actual Duck brand, or LL Bean, but they are the same as far as leather uppers, and rubber lowers.. mine are insulated, the one's below aren't.. Mine have a much heavier lug than these..
OH, and here's those "freak" boots I was talking about..