Government services requiring car ownership

I recently booked some backcountry campsites in a national park (in the USA). My plan is to hike from one town to another over a few days, and the camp sites are by reservation only. These sites are not accessible by road. When i made the reservation, it required me to put in the make, model, color, and license plate of my car. I will not have a car with me, nor could I (since there are no roads), yet this information was required of me (no opt-out).

I'm assuming this is just because the system (recreation.gov) is run by a giant defense contractor (booz allen hamilton), and they want to harvest as much information as possible. It made me wonder what other government services are only available for car owners that are completely unrelated to car ownership. I'm inspired by seeing a post about while ago that talked about government services that require you to have social media accounts.

I'm sure there are other examples of this phenomena.

P.s., luckily, the sign up form is dumb, and it didn't use dropdown menus for car make/model/color, so i just put in gibberish.