I'm a teacher as well and this past week was crowded, but not as bad as I was expecting. We rented a car and drove many days this past week and during peak times but traffic wasn't bad at all (except when we got stuck behind someone going extremely slow....I'm from New York and we don't drive that slow!). This was a great time to go and we saw and did a lot. I was here four years ago during the same time period and crowds were the same. We had a great time and are planning on coming back in two years during the same weeks.