We will be driving from Sequoia National Park on a Monday in October, going to the cruise dock in LA. We want to mail our hiking clothes to our home so we don't have to carry on our cruise. Where would the most accessible post office be between Sequoia and LAX? Part of our concern is that we may not reach the post office till after closing hours....so would need to have the option to simply deposit the box of clothes in that "mailing machine" option that is in many postoffices. Hopefully someone knows the answer to this tedious question!