Another tip for changing a prop in the water, if one needs too. I keep an extra large green trash bag on hand, put it in inside a huge fishing net, and put it down and up over the OB lower unit ... if we dropped anything ... we didn't lose it. I now have some of those lanyards you can snap or velcro to tools so they have a leash.
Those ring buoys also make a nice cushioned seat too, when one needs to convert a 5-gallon bucket into a head :sorry , sorry for the visual
! But seriously, I grew up on old wooden boats and that was the order of the day for boats without heads. I recall when my Dad was one of the first to install a real porcelin head into one of his boats, his was the envy of the rest of the boatyard for years.