One of the problems with LNT with Cub Scouts is the fact that the adults are accustomed to "just doing it" instead of doing it along with an opportunity to learn.
Oat meal in the morning? Boy takes his packet, tears off the top and pours the oatmeal in his hot water. The adult dramatically gasps and holds his chest while making a big scene. The adult has the attention of all the boys! He then points out that this poor Cub has made 2 pieces of garbage in stead of leaving the flap on so he only has to worry about one piece. With a smile, the adult thanks the boys for pointing out this problem to the other boys. This type of lesson can occur in a cabin, in a house or in a campsite. Usually as a tag-a-long I always apply LNT to their homes as well. Pick up after yourself! Do you leave traces of you being there in the kitchen? The bathroom? The living room?
A piece of bread falls on the ground during lunch and the boy doesn't retrieve it. Again with the over-dramatic act. Warn the boys about all the animals that are going to attracted to it after dark. Then look around to make sure no animals are already coming in. Remind them to keep their flashlights handy! Then carefully and dramatically retrieve the little piece of bread as if it is radioactive and slowly put it in the garbage. Then with a loud whew, tell the boys how heroically you have again made them safe again.
A couple of outings like that and the boys will think you're a blithering idiot, but they will learn! and have fun doing it.
Resources? We don't need no stinkin' resources, your boys are the best resource on the planet. They are going to mess up and step into heroically teach the boys a LNT lesson.