Ah, you'll be joining the growing number of us locals who have driven down here from the States and Canada. My advice... take your time and enjoy the experience. You can read about our experience doing the exact same thing 2 1/2 years ago on our blog,
Our Mexican Adventure. Unfortunately, work has prevented us from having many recent adventures and our blog has not been updated recently. We hope to change that soon... as we say here in Mexico, mañana!