I wasn't a big fan of the BFG T/A when I had them, but I seem to be alone in that opinion

It was 20 years ago, so maybe they've gotten better
According to TireRack, the T/A KO2 are all "Severe Weather" rated (only some of the KO are) which is a step above the M+S rating. If you're heading in to the Mountains in February, I believe the State Troopers will be looking for snow tires.
M+S rating just means there's a certain percentage of open space in the tread, just about any tire you buy will have that rating. For snow traction you want to see the Severe Weather rating with
the Mountain/Snowflake pictogram on it. Those have been tested to perform better than a baseline tire in the snow.