[HO455]

3 or 4 people in a truck was common back in the day. As far as loggers commuting to the woods for work it was everyday. Gas was expensive and truck pooling saved money.
Winter time with extra clothes things were tight. You would take your coat off and it and your work boots would ride in the tool box to make more room. Nothing like stepping out of a warm truck to put your boots and coat on in 10 degree or colder temperatures. And your clothes have been riding in the tool box for 50 miles.
With a 4 speed the rider next to the driver was expected to move the shifter so they could move their legs as the shifter moved.
I find the California plates on the truck interesting. They may have drove from California with 4 people.