Driving up the Alaska Highway, 2019 Edition
Camping in BC can be pretty expensive, but it is also fairly easy to find free camping spots as long as you are not on the islands or the coast. We used a combination of iOverlander, Park4night and Campendium (where I posted many reviews years ago about many spots in Northern BC) and were able to not pay for a site once after leaving the island. Granted, there were quite a few parking lot and industrial area nights, but as soon as you get North of Prince George, there are many rest areas and pull outs on the side of the roads where you can sleep for free, all the way to the Yukon!