What time do you plan to arrive at the test center on Saturday?

Is it necessary to arrive 1 hour before the exam? I live about 1 hour away from the test center, so I plan to arrive around 7:45 or maybe even earlier to find parking space. My test center is in San Francisco, Fort Mason.

Planning on parking at my buddy’s place around 7:30 and it’s about a 15 minute walk to the convention center, so probably around 10 till 8 or so I’ll get there.