I would note that, driving from Oregon to SoCal, Rt. 99 is a slightly busier and less well-maintained road than I-5, and short stretches are not even limited access, but it’s quite a bit more interesting–more development, more towns, more PLACES TO EAT along the way. Most Californians would nominate I-5 between Stockton and Bakersfield for the most boring drive on earth (with stockyard scent thrown in). So you might consider using 99 rather than I-5. They both connect Sacramento and Bakersfield.