Parking on campus can be something of an adventure, but it's often easier if you arrive by or before 8:30am. If you are driving, we strongly recommend parking in Parking Structure 6, also known as the Wilbur Field Garage. It's a very short walk to the David Rumsey Map Center. Be sure to park in visitor parking spaces, and pay for a full day at the parking permit machines. You can also use the Parkmobile app to pay for your space.
Alternative methods of getting to campus from your hotel can be found at Stanford's transportation site here.