Clearwater's program for 4th graders looks good to me. This is a good opportunity to involve Boy Scouts in the training, from the troop these Cub Scouts may be bridging to if they decide to continue in Scouting: a great opportunity for older Scouts to show the kind of fun they have at the higher level. And the older Scouts can show and demonstrate actual PSKs they have created for their wilderness survival and emergency preparedness merit badges. Talk to the BSA troop scout master, I imagine they would be glad to work with the Scouts to get some volunteers for this kind of activity, it falls into the category of good fun / good experience for older Scouts / and recruiting for new Scouts.

And as with most Scout-led activities, if you can get the kids to participate, they also will take on a share of the responsibility for the actual training, reducing the dependency / pressure on you to teach and organize it all.