Hi SCS,
That combo of uses you specified for season and terrain, and how far you will be walking, is a tough one to meet all requirements. I recommend a two boot system with a hunting boot in leather/synthetic, and a higher cut pure rubber boot for northern swamps and wet snow:
Hunting Boot:
I recently had to retire a cherished pair of Irish Setter boots that provided superb and hard service over many years, and the leather on the uppers finally gave out. I got my money's worth and then some. I can't recall the model name, but on IS's current website they are closest to the "Gunflint II". Mine had 800g of Thinsulate, whereas the new ones have 1000g.
They were however getting quite heavy for long walking grouse hunts (I am getting older and slowing down), where I might walk maybe 10 km per day, so I looked for something lighter, and last year purchased the Iris Setter Vaprtrek LS. Did some grouse hunting in them and they were much more comfortable for walking long distances. Waded some water and the waterproof membrane worked. Never tested them yet in cold snowy weather.
The Vaprtrek's have a thin synthetic outer shell which is much lighter than leather, but I have no idea how well they will hold up to heavy use in the bush with sharp sticks, rocks, and general abrasion. I somehow doubt they will last as long as quality boot leather uppers, but we'll see. The lightness of them for my purposes is worth the experiment.
I find Irish Setter fits small. So I needed to go up a half size, and I needed the double EE width. Look for the "E2" code on the tag for the double width.
Rubber Boots:
I am a big fan of Nokian rubber boots with the felt liners and the top cam buckle quick adjust cinch strap. The cinch strap helps to reduce/eliminate heel slip and blisters, and keeps debris out. I have used various models over about 30 years. Some of them have deep grippy lug sols that can use metal stud inserts for ice if you need them. On their website, closest to what I have used are the Finnwald and Kaira.
I often remove the Nokian felt liner and custom adjust the fit with an insole and 3 layer sock system: thin wool one inner, medium thick wool/synthetic in the middle, and a heavy duty wool sock on the outside. I find it easier to dry layers of socks than a felt liner. And the multi-sock system seems to breath somewhat better and wick moisture towards the outer sock better.
Another great rubber boot company with felt liners is Acton Boots, a Canadian company. Again look for the cinch strap or top cord tie to provide that tight leg grip, debris seal, and reduced heel slippage.
I am a difficult fit, and many times over the years a purchase of shoes or boots that ended up not fitting well is donated free to the local used clothing depot. I know that a person in need is going to find those lightly used boots or shoes and that will make a difference in their lives. In my town we have alot of folks down and out on their luck, and I am happy to donate footwear that will keep them warm and dry.
