I live in Vegas and have hiked all over the Spring Mountains and also ridden the resort there several times. It's a great area but I haven't been up this season. Problem with the resort is temps are so high there in the day that you have ice in the morning (which takes awhile to melt since the resort is in a canyon), good snow around lunch, then soft stuff at the end of the day. The terrain stuff they have is actually pretty decent, but I'm not the best judge since I don't ride that stuff. Groomers are short and lifts are slow. You won't find super steep stuff anywhere. There are some moguls under one lift and an awesome off-piste run through a riverbed that's easy to get to.
That said, there's a reason a lot of Vegas locals drive 3.5 hours to either Brian Head or Big Bear, which cost the same as Las Vegas but offer way more terrain and challenge. Both of those places have been getting snow so by January their bases should be in good shape. Brian Head has 7 of their 8 lifts open and I know Big Bear and Snow Summit have close to 100% open right now. I rode Snow Summit two weeks ago and since then they've gotten blasted with at least a foot, I think. Their snowmaking is extensive since they can use Big Bear Lake as their source.
Depends how long you're looking to travel for but I'd say follow the snow. Check the conditions a couple days before and plan accordingly. It's an easy drive to either Brian Head or Big Bear.