One more suggestion, especially for California people:
If you have a passport, bring it with you. Better yet, spend the $25 or $30 to get a passport card, which fits in your wallet. No mucking about worrying if your driver’s license is a TSA-approved version.
Also, the price difference in CA between a regular license and a “OK to travel” license is more for 5 years than you pay for a 10 year passport card, and the passport card requires a lot less hassle!
“No mucking about worrying if your drivers license is a TSA-approved version.”
I finally got around to getting the Real ID compliant driver’s license the other week. I had to bring in my birth certificate and then put up with the DMV. It was like a double-whammy kick in the ‘nads. ;-)