Renting & Insuring a Tow Vehicle

How many people? Maybe rent a class B van? If you want to check out San Francisco in a smaller tow like vehicle, they have many options like car share where you rent by the hour or day throughout the city. But parking it around will be costly. A sightseeing tour/trolley would be more cost effective. LA might have the same car sharing service. Yosemite national park has a bus system. Napa will handle the larger vehicles.