FWIW...
I've run two sets of Duratracs, they are fantastic AT, but not MT (but have the look of MTs....).
Pros: Low road noise, very wheel-able for light to moderate off roading, good design for all-season, lots of sizing available.
Cons: soft side walls (tear easy), even aired-down do not shed mud well, barely sufficient in snow >2" (no idea how the coveted snow-flake certification) so if you get serious snow you'll need a bonafide snow tire.
If you are looking for an AT with snow biased performance check out two tires from Nokian: SUV WRG3 and the Rotiiva
I have run a few sets of their all weather (season) WR and it performs as good in the snow a bonfire snow tire with no dry/warm weather performance or wear loss. The Finns have poured a lot of engineering to both rubber compound and geometry of siping. The work fine on gravel roads roads but its far from a MT, more like a lite duty AT.
While I have not owned the Rotiiva, yet, I have two buddies who ran them last year here in New England: one set is on a 4rnr and the other is on a 97 FZJ80. I have spent some time hooning with them on snow, but not gravel, and they were impressive on both slush and hard packed snow. Both my buddies found improved performance running'm around 30PSI vs 35PSI on snow/in winter.
Also, if you are planning on wheeling, don't mind some road noise, and want good snow performance look into Firestone Mts and Interco Truxus. Both MT off road tires, but I have owned and run in snow with surprisingly good results.
All that said, you always sacrifice something with an all season/all terrain. Thats why I tend to run bonafide snow tires on vehicles I will be running routinely in the snow.