Take the Evans airport shuttle from either Oakland or SF airport and stay at the Marriott Courtyard in Vallejo per the school's recommendations. They recommend that you do this for several good reasons! I interviewed at Touro CA last week and flew in and out of Oakland (smaller airport = less hassle). The Evans shuttle picked me up at the airport (no reservations required!!!) on time in a really nice coach bus and dropped me off at the front door of the Marriott an hour later. The front desk has tickets for the shuttle so you pay for the shuttle at that time ($29 one way - cash or add it to your room bill - you can buy your return ticket ahead of time, too). As for the hotel, you can't go wrong with staying at a Marriott. I always choose Marriott because they have the best customer service and you know that the quality of your room will be good.
The next day, the courtesy Marriott shuttle drove me to and from Touro, also on time. (Don't forget to check out of your room before you leave for Touro; the front desk will gladly hold your bags.) When I got back to the hotel after my interview, I changed out of my suit and hung out in the lobby for an hour or two until the Evans shuttle came to take me back to the airport. As with all forms of personalized transportation (taxis, etc.), remember to have some $1 bills on hand to tip the driver!
My trip was great because I didn't have to worry about travel directions, getting lost, where to park, filling up a rental car w/ gas, picking up/returning a rental car, BEING LATE to the interview!!! A round trip with the Evans shuttle might seem pricey, but when you consider all costs of renting a car and the extra worries I mentioned before, then $58 is well worth it. Just remember to look at the Evans shuttle schedule before booking flights to allow enough time to catch the next shuttle after your interview ends and get to the airport for your return flight later that day.
Hope this information is helpful. Bring a good book for the waiting periods, pack lightly, and your day will go by smoothly!