All you do is show up at least 30 minutes before takeoff. I Uber in so can't tell you about parking, but you walk up to the desk, give them your ID and they give you your boarding pass.
I have not flown out of Oakland. Only Burbank and Concord. The address in on their website and if you GPS it's pretty accurate. Terminal is away from general terminals. No TSA, simple bag check and make sure you have no lithium batteries in your checked luggage. It is a fanatic way to fly!! Enjoy!!
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