This is worth considering, especially if you travel alone. Those who are thinking of the timing are forgetting just how bad the homeland security officers are when they feel like it. I was threatened with deportation and held for 6 hours (missing my connecting flight) all because I was staying at a residential address for the duration of my visit.
Even if traveling with family, the queues in places like Sanford can be horrendous. Even the Americans complain about how bad their airports are.
We met a family in New York a couple of years ago and the mother was in tears of frustration at the way they were getting treated, and they were Americans.