My worst hair day was a week on a dive boat in Australia. I kept my messy braid nearly all the time until I found somebody who shared his three minute shower with mine.
My bad hair days are usually after sports or wearing a helmet. And I don't have the time to brush out all the knots. I then put it up in a bun as it is, even for days until I have the time and patience to tend to it.
The bun still looks good and gives me a break.
Petra