Putting on the river at Camp Nine.
At put-in on the Stanislaus River at Camp Nine, rafters parked on the road to blow up boats, carry gear down to the water, and give safety talks to passengers.
Rafters would carry their blown-up rafts down a short hill to the river to put them into the water. Then, they would rig the boat with whatever gear they wanted to bring. One-day trips typically only had lunch and safety gear, while overnight trips would have a lot more gear -- carried in "oar boats" while most passengers paddled in a paddle boat.
A safety talk would cover all of the essential safety information for being on the river. Although this would of course include how to behave on the river and what to do if you ever found yourself out of the boat, in reality the threats most likely to occur were typically on shore -- tripping over rocks, running into rattlesnakes, slipping and falling, etc.