If you can privately afford the hourly operating costs of a small GA aircraft, then you can most certainly afford twenty or so bucks to land it.
If you can privately afford to drive a motor vehicle, then you can most certainly afford the $20 fee for using the rest stop with playground, toilets and barbecues at the edge of the country town you are passing through on your $300/day family holiday.
Oh wait, they don't charge $20 for that, they just put it up so they win some business from people passing through.
You are missing the point, I am afraid...