What is the subject line for this email?

we are leaving for Estes tomorrow and will not be back until the following Sunday. You can call Will's cell 214 478-2066 if you need us or call the Snyder's in Estes. I am doing fine. The baby is kicking and ready to cool off in Colorado. I will chat with you when we get back. We love you guys.
Just wanted to let you know.....