Just wondering, why have linked steering the default when there directions on how to use rear steer when you first load the truck?
Situational inputmaps aren't supported by the game just yet. They'll show up either way, even if independent steering isn't selected.
You know what you should do for this kids asking if they can get the truck early? say "sure but it'll cost you $5" and you can have them donate to a patrion account or something