Meo has worked on identifying/classifying the highest summits of the Torngats.
BTW, see http://www.lnt.org
The problem I think with with "sensitizing" people is measure. About 10 years ago, I used to do some endless lecturing to anyone I went outdoors with. I found that this often leads to the exact opposite effect than what I aimed at. People tell themselves: "oh, another enviro-defendor-socialist-gorp eater, this guy is exactly what I wish I will never become in my lifetime". Not only they do not take the behaviors you suggest, but also they classify you and others like you as "moron-fish-and-tree-protectors".
Over time I changed my approach: it is harder to find a very subtile approach and giving the right example without being seen as the enviro-terrorist. Such a gentle approach gives limited results and slow progression, but at least it does work.
Triggerring questions in people's minds is enough to bring them to the right answer. Trying to write the answer directly into their central memory does not work, they need some processing to be done. When people see you walking far from the river and campsite to dig a hole, they will either understand, or ask.
If you want your friends to see a particular movie, option 1:
"humm, have you seen the XYZ movie ? Still not know what to think, maybe not as good as most people say, but still whether it good or not, I'd say it is ... euhhh, special"
"you gotta see this, you gotta see this, man its very good, you gotta see this, you gotta see this, man you gotta see this."
What I'd do for this guy, just tell him something like:
-at the same time that you rent a canoe or book a flight, maybe ask them for the barrels"
- barrels ??? barrels ???
- yes, I THINK most people bring their feces back because... SHORT bla bla... yeah I know it is more trouble, but in any case if you want to do this better ask them I'm sure they know.
Or ask him if he is afraid from NOT being at the end of the feed chain, and give him friendly advices re. what to do with his food to prevent trouble, and maybe add that "supposedly they are starting having trouble because probably only a couple of groups attracted bears. "
OK, now I feel that I did too much lecturing... you will say "humm, Leduc is exacctly the kind of guy that I wish I'll never be..." and so on