Never driven myself but I have family that way who have driven up to me,  3-4 hours on a steady run. 
I used to be a ski instructor many years ago but never went to Sierra Nevada but heard from other instructors,  OK for beginners better for intermediates but limited for expert skier/boarder due to lack of hard black runs. 
 
Avoid weekends and Spanish holidays  as it can get very  busy with locals,  weekdays are much quieter. 
Its definitely something I will be doing,  well worth a few hours drive. 
 
Richard