I would suggest you wait until the weather clears to come up for a day in the snow. At this time you are required to have tire chains on your car or 4×4 with snow tires even to access Wrightwood both from 138 from the east or N4 from the west.
The weather service is saying we will have storms thru Wednesday this week. It looks like we will have plenty of snow plenty for snow play for a while.
If you do need to come up make sure you are ready for winter travel and have tire chains that fit you car and know how to install them. Chains are available at the Shell gas station at the I15 and 138 and also at Mt Top Mini Mart
Yahoo for WINTER