They didn’t wear pyjama’s to work, but they did wear them out of the house to go buy snacks or such. Also, a number of us didn’t normally wear suits or ties to work, especially if we were technical and not sales or administrative. This might have been due to not being in Canada. I did a few weeks in Toronto, and a number of guys followed the same rule.
To add to this, the Primitive Technology channel on YouTube shows how to make a fire with two sticks. The key to his preferred method is a harder stick with a point and a softer one with a notch. Then you have a lot of work, prep, and trial and error ahead of you.