This is a classical circular problem of transportation planning: when deciding whether to get a car, and if yes which car, people often use their vacation as a use case. And then, when they got that VW bus to go to the seeside once a year, using it in the city is the logical choice, because it is just lying around. Basically, getting a car is expensive, but once you have it, using it is cheaper (and often faster and more comfortable) than the other options.

So a lot of the discution about getting people "out of cars" is not about getting people to never drive, but to get them to not own a car, such that they have to make the concious decision of renting a car for the holidays, if this is the best choice, for instance. What you describe sound like this.

Obviously, this opens the question of how to improve the car rental market to make those options real options. This is where car-sharing systems and the like come in.