So, you build hip waders?Waders are dangerous if you fall and they fill with water, how deep is your deep-water crossing?
Here is what works for me when canoe hunting plus needing to wade around in water too.
Waterproof Insulated dive booties and over them insulated waterproof LL Bean ankle higher canoe shoes. If a crossing is long enough, they will get wet yet still be warm-ish. I keep a roll of TP to dry them out when crossing is done and heavy rag wool socks to replace dive booties.
Next leggings cut from any old lightly insulated wetsuit bought at a tag sale. Cut them high on the hips to attach to a belt. Unlike waders you can take a crap easy. These are much like native American leggings
Wool shorts. Heavy wool under sweater with a thin dive vest over that.
Next, I like a North Face waterproof long anorak with hood. I put an elastic belt around my waist and around
my cuffs, i cut strong wide elastic bands from motorcycle tire tubes.
Lastly, I like a small Jan-sport backpack, and I put things in there first putting them in zip, lock bags with air left in. Dressed like this I can be comfortable in terrible weather.
Last I like a stainless synthetic carbine with a hollow stock