I went through most of Northern BC a month ago and there seems to be no vape shops in sight. Make sure you have what you need before you go.
From Hinton to Prince Rupert ecigs just haven't caught on yet. I find it funny that the most environmental province hasn't got the hang of cutting out smokers yet. I'm sure if you go further south there will be some vendors, but even then I can't find any in Revelstoke or Kamloops, and those cities are hundreds of miles away.