if was planning on sitting for any length of time in cold weather , I'd probably be looking for a "felt pak" style like Nokia or Kodiak. Not the type of boot that you'd want to walk far in, but with a good layering of socks they will certainly keep the toes warmer than most others that I can think of. I have both these and 1000 g thinsulate/ Gore-tex styles and for just plain sitting on the watch, give a felt pak any time.......just my thoughts......anyhow
Danner Ft. Lewis 200gr Thinsulate ( the originals). This boot has served the vast majority of my biggame and upland bird hunting needs. Sized 1/2 size larger than my normal size to accomodate extra heavy weight SmartWool socks and sock liner in cold weather. In milder weather I install footbeds and wear with midweight wool socks and liner. Always been happy with Danner.
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....