This was Violets about a month ago:
You will want breathers attached if your going to go through it although on the day those pics were taken 2 vehicles made it through without snorkels, both mitsi's, and the suffered no issues, balls of steel though, I wouldn't have done it without a snorkel!
Why do people try and drive as quickly as possible - you wouldn't need a snorkel if you took it slowly, you're not trying to recreate a tsunami in Essex! Seen the same with drivers on rough green lanes, going like hell and destroying everything.