We also made the trip to and from San Diego a couple weeks ago, actually was Memorial Day weekend. The Cajon pass presented no problems in traffic flow coming or going, it was moving... anytime it is moving, it is good. Read something about an X crossover, where CDOT can make lane changes, when traffic is heavy. Allowing more traffic flow. Oasis, great RV park, just off I15, Sunday morning traffic early should not be a problem for you. That is probably the best time to head North on I15. There are lanes that turn into Exit lanes only, be careful of those. I will stay in lane 2 counting from the left. There is an express lane also on left side. Happy traveling.
