Thanks for the input. The idea is to put the keycard in the trunk and keep driving down the road. I realize now that is was very unclear. Will change it as soon as I have time.
You can pee at any of the trees around the cabin. Maybe should make this clearer.. Hmm the car freaking out seems to be when the character stands to close to the car upon entering. I'll try to fix it, thanks!
Edit: Made it clearer where to pee, and the car freaking out should be fixed now too.