Brett, there are places to boondock on Crown land, but be aware that if there is active logging, you need to be able to pull over and let the trucks through.
Some folks carry CB radios so that they can monitor truck traffic. If there is a truck coming down the hill with a big load, you will want to stop in a wide spot and wait. The corners can get very tight -- the logs often stick out over the end of the truckload and "sweep" the shoulders of the road.
There are other folks on this forum who know a lot more about this than I do, but I know just enough to be a little wary of taking a trailer into a logging zone.
Having said all of that, the ordinary campgrounds in the Canadian national and provincial parks are world-class. So although the boondocking is not as "free and easy" as it is in the western part of the USA, the campgrounds are excellent. Great views, great locations, well maintained and staffed.