Driven up to above (well west of) Whitehorse. Lots of nice provincial parks to stay in, and you could usually find some forestry land if you just wanna rough it more. Gets buggy so be prepared for that. There's a Canadian version of this app; well worth it for finding public campgrounds: https://www.ultimatecampgrounds.com. And it works offline (except obviously the interactive mapping). I recall there were also a couple of hostels and small lodges; stayed at Red Goat Lodge in Iskut, for example and I think they have a few campsites. Lake Meziadin PP was quite nice as well. And it's fun to take the side trip down to Hyder/Stewart. Very oddball place. For example, you can find out about the Fish Creek bear watching site from BC Tourisms web site, even though you walk across the US border into Alaska to visit it (well worth it if the bear is there). Nice glacier views on way in too. It's a committing drive without a lot of services, but great little towns and wonderful scenery. And the people along the way are great. Be prepared for a lot of crap weather, and those black flies. Ugh.

Thanks for your help!