Like taking care of doing laundry, doing the shopping, and running all manner of errands? In the cases I have observed that is what typically has actually happened.

That said, I think that the Pacific coast would be a place where it might be the most tolerable for the driver as compared to most US touring locales. If it can work anywhere it can work there. It would be pretty grim for most drivers on the average coast to coast tour.

My wife expects to drive sag for me when we retire and to be honest I dread it. I may actually give up bike touring and either car tour or motorcycle tour if I must have a non rider along. The presence of a car in the mix kills many of the reasons that I tour. I personally would be inclined to make it either an unsupported bike tour or a car tour where I go on hikes and bike rides.

The other thing that helps in this case is that the OP sounds like he won't be cooking and camping