Incidentally, it's almost guaranteed that the CHP will be running heavy enforcement along Highway 101 between Santa Maria and Gaviota on the Labor Day weekend, so any ideas of making the 101 run at high speed to make up for it's greater length should be avoided...
By contrast, the Northern I-5 sections of the other two routes mentioned sees very little CHP presence until one hits the I-5, US-99 merge just before Tejon Pass. Even though labor day in general sees greater law enforcement presence, CHP is still very thin on the ground on I-5, since all arrestees have to be hauled either to Bakersfield or Fresno...well east of the highway.