Looks like it is. I was at Beaver a couple weeks ago and the conditions were great for this time of year (only skied Beavercreek, not Bachelor). Probably even better now. I'm heading back to the area today for a stay through January.
Looks like Arrowhead still isn't open so that eliminates half of the immediate terrain. I usually stay at the Westin and the traverse back from the other mountains via Primrose is somewhat flat and not the best for kids and boarders but doable. Looks like the trails through the residences aren't open either. These can be fun and an interesting way to get back.