That's awesome, I know exactly how you feel.
I wasn't fortunate enough to serve just four years. I got put on stop loss and my career field was one of the last three to get removed after 9/11. Be especially thankful you're separating as scheduled.
My drive home I left Whiteman AFB, MO and made my first and only stop just outside of Denver. From there I drove 18 hours straight to get home in California, it was already long overdue.
The GI Bill is really nice! And you get a better one than I have that started last year!