JMO, but I do think a "water baby" in a familiar setting, with windows open would have a better chance of escaping.
All things being equal.
But I also do not think it makes any sense at all to be extremely inebriated and end up down there in the water in the first place. The only way it does to me is if you:
-continued to party AFTER the campsite farewell party and things took a turn somehow? i.e. you;re right there, the scenarios
@RedHaus went over often already
-some unknown foul play
Driver error doesn't make sense. I agree with Doug from AWP it doesn't seem a "wrong turn" road. It isn't cruising along texting and uh-oh......water...kwim? How the heck do you get down there if you do not mean to be down there???