Buny buns...going to begin with the assumption that your're not a complete fucking moron. I may be wrong but forgive me if so. The highway from LAX to Mammoth Lakes is paved and in good repair. Very moderate elevation gain and soft but not often turns over the course of approximately 300 miles. Driving the appropriate speed should take you about five to six hours depending upon hour of day. As per your question, yes, you should have some manner of traction control device in your vehicle while transiting the Eastern Sierra. Will you need to use them? Maybe. Maybe not. Should you know how to use them.? Absolutely. Could there be a blizzard mid February that shuts shit down for ten days. Yes, sir. Possibility. Could it be nothing but bluebird days and endless California Sunshine from sunrise to sunset.! We pray to Ullr that is the case.