Funny that you mention that Dateline report, I used to live in Campbell River BC. http://visit-vancouverisland.com/campbellr.html
I did not know the girl who went missing but I am familiar with the goings on with the heroin problem in Campbell River. The dealers all lived on 7th ave, they got most of them deported back to Vietnam but rest assured they will return under a new name.
I have witnessed how ruthless the dealers can be, a guy I know (his name is Glen) was hacked with a machette while defending a girl from being decapitated at the pool-hall by a stoned vietnamese dealer, he got the dealer back as good as he got him though.
Glen was able to parry the blow of the machette with a pool cue, which saved his arm from amputation but he still has a wicked scar, as he was bleeding he responded by beating the crap out of the dealer, who was "too high to die", with the fat end of the pool cue then finished up by stabbing the cue into the guy. Both went to the hospital in ambulances but Glen faired much better.
Some things that are misleading about the dateline report is that there is no ferry from Campbell River to Vancouver,although there is a ferry from campbell river to quadra island, the ferries run from Vancouver to Nanaimo or Victoria on Vancouver Island, there is also the fact that there is over 750,000 people living on the Island and it is not just some sleepy village...
Vancouver Island Statistics, Length : 282 miles, Width : 62 miles, Area : 12,408 sq. miles, Thats 60 people per square mile on the Island, while Washington State (where I live) has 88 people per square mile at 66,544 square miles, Vancouver Island has 20% the area of Washington State. At the same time BC has an area of 357,216 Square miles with a population density of 11 people per square mile.