If you think their first day of kindergarten is tough, be afraid ... be very afraid. This is way bigger, and so I suggest you take along a buddy. Someone who is extremely uncomfortable with tears and would rather make you laugh than watch you cry. A good friend who is willing to sip Long Island Teas and talk about anything else but the fact that you've just left half your heart three states away.
It does get easier. Kate is having a great time, and somehow knowing that her adult life is starting out the way she wanted gives me comfort. In honor of elementary school starting back up, I thought I'd leave you with this.