Not certain where you're posting from, but there are some significant differences in the camping/hiking in BC over the UK:
-BC is huge, almost 4 times larger in area than the UK
. This is pertinent, because there is only so large of a trail/campsite budget to spread over a big area, so many destinations are very basic. A good standard would be flat campsite, a pit toilet and a metal fire ring, but plenty of destinations do not have even that.
-There's a big range of camping types, from full backcountry (you need to bring EVERYTHING) to frontcountry/car camping (drive-in, neighbours and noise, piped water and electricity plug-ins).
-There are 2 major resources when researching camping and hiking areas. BC Parks/Parks Canada (Provincial and National Park management, respectively), and BC Recreation sites (website
). It's worth noting that Parks does not necessarily seem to make camping or hiking a priority in their management plan; within that scope, car-accessible camping makes up a large part of their focus, and rules can be strict (as perhaps they need to be with so many users).
- There is literally infinity options for camping and exploring beyond these resources, if you are flexible about what you need in a site/destination and responsible enough to clean up after yourself.
-My impression of walking/hiking in the UK is that the emphasis is on routes. BC would contrast this by having the emphasis on destinations.
-Huts/cabins exist, although in an ad-hoc way and by no means systematically (privately managed, Alpine Club
, secret/illegal, etc.). Bring everything you need, assume there will be no facilities for you.
-Because BC is so big, the best routes for you may not be nearby or easy to get to. Choosing a destination is always a balancing act of time available, type of destination/experience, difficulty, ease of access, equipment necessary, and expected reward. Every BC camper choosing an outing faces this. This site is a great way to research trip ideas (so many great photos) once you've got basic understanding of the various areas around Vancouver.
Beyond this, I can recommend Garibaldi Prov Park for a great destination for multi-day trips. Depending on your intended dates, you won't have it to yourself though, unless you're planning on (responsibly) getting off the beaten path so-to-speak.
I'm sure others can pipe up with their faves.