The question was what material and how to get folks to pay attention.
I fear that getting their attention is the hardest part. The "duck hike" was a great idea for scouts but I expect that adults probably won't go along with it - you'd have to be too much the drill-sergeant to get them to actually do it. And the bellyaching you'd hear if one failed!
If everyone is along voluntarily about all you can do is set a good example, offer good material, and then talk up the preparedness status along the way with what-ifs. OR you can do a gear check and turn away the slackers. That's really tough to do.
In emphasizing filing a travel plan I constantly refer to the "really sharp knife" (that Aron Ralston wishes he had when he had to cut his arm off in Blue John Canyon) as the alternative approach..... gets grins but probably doesn't get anybody to file travel plans.
I dunno. Humans- pain in the butt critters.... hard to herd.
(I'm the "Hiking and Preparedness" instructor for a group of Aviation Archeologists.)