Walmart or Canadian tire has all the basics you need and for a lot less than most trailer places. We try to make a list of things we want and when we go to the US hit a Camping World, they are great! I think being in Vancouver you would want to make sure everyone has rubber boots and rain gear. We never leave with out it. Like others have said make sure you have a tool box and some spare parts, duck tape, fuses, light bulbs etc. Bring a pencil and paper and keep a list of thing you missed, we do this all the time. A flashlight is a must, and a deck of cards for the rainy days.
Enjoy! We can hardly wait to get out, unfortunatly for us it will be another 2 months.
2010 Jayflight 24RKS
2010 Dodge Ram 2500