If you have a strong desire to sit in either the Elephant or Warthog sections, you may want to arrive somewhat earlier, since those two are smaller. But in terms of just getting into the show, the advice you've gotten above is spot on.
I've probably seen the show about 50 times since 1998, and about 49 of them (all but the very first) have been in the Elephant section. So I tend to get there early.