Do you think my dad is being insensitive? I don't know what to do?

Yes, he sounds a little insensitive. Since he wants to be the alpha-male, maybe you can use it to your advantage. That's an awful long walk in the middle of the night just to use the restroom, especially with all those wild animals. You may have to wake him up in the middle of the night so that he can walk with you, to protect you. It's not safe for a young girl to go walking alone in the night to go to the restroom. Since he had to make reservations, I'm guessing that there will be other campers there. Does he know who they will be? Is he absolutely positive that there won't be any wackos camped between you and the restrooms? If your mother couldn't convince him, I doubt that you can do it either. Maybe play up his ego. Let him know how much you're looking forward to it because you know he'll be there for you. If that doesn't work, maybe ask for some extra camping gear, like a whistle and some pepper spray.