My son is a freshman in L&S and has had no problem getting classes. He has was able to use a lot of AP credits, so the number of units from he will need to graduate will be relatively low. Plus, he’ll probably get a science GE out of the way at a community college. No one he knows has had a problem getting classes, as long as they are flexible about the professors etc.
@Interested_Dad - ha! My son would happily take a night class, but he would gripe up and down if he had to take an early class!