Chain control on the way to Yosemite

I'm scheduled to arrive in the Bay Area on Sunday and to drive up to Yosemite early Monday morning. In warm weather I would just take 120 to the BOFR entrance, but there's a good chance of snow over the weekend and into Monday morning, so I'm thinking of taking the longer route in on 140 - less likelihood of snow accumulation or the need to use tire chains. Is my assessment correct?

Yes, 140 doesn't go as high as 120, so you're less likely to encounter any snow along that route. But... you still must carry chains along either route, and if there is a storm the rangers at either entrance station may ask if you are carrying chains. Going in via 140 only reduces the odds that you'll need to put them on.