When I'm fishing or paddling my canoe on waters that there is motor boats, I have a fluorescent-orange ball cap that I wear, along with my PFD. I swear I don't know how it is that bright without batteries, but I've actually had bass boats come from down lake to check out what it was having that color. I also have a 5' fiberglass rod w/flag, like the ones used by bicyclists, inserted in the stern. I believe the first step to my safety is my own and if I can be spotted a mile down the lake that is fine with me.
Pass the "Sportsman Baton" on before you're gone, promote values for others to hunt and fish upon.