We have done this trip a few times before. We have 2 drivers who are night owls and are able to sleep in the car during the day when the non-night owls are driving. We get there early in the day(because we leave early) and spend the day re-cooperating at Grandma's. Thank you for the safety concerns. We know from experience that the night in the hotel is fitful sleep at best, especially when everyone just wants to get to Grandma's! We can stop at a rest stop if we do need some sleep. We have a 15 passenger van, so plenty of room to rest compared to a small car or minivan.
So on the way back, we wanted to split up the trip into thirds. 8-9 hours on the road for 3 days. Going back on I-5 only is really boring, so we thought we would break it up with some time on the southern coast in CA. Where is a good place to stay just south or north of San Francisco? And then back to the 5 in Southern Oregon for the most direct route home on the last day?