A few things to keep in mind.
It is REALLY dry in BC and things change in seconds, be prepared where ever you are camped to bug out in minutes.
Driving is not the only thing that the smoke is effecting, breathing is an issue as well. In Kamloops last week the air quality on a scale of 1 - 10 was at 40! Put your air on recirculate when going through the smoke. If health conditions be extra careful.
If you are going to do any hikes be aware of the fires around you. A wind change and things can get bad fast.
Keep your vehicle gassed up. You never know when or if you are going to have to take off and where the next gas station is.
As much as BC has a lot of amazing camping spots in the bush I would strongly suggest camping in established campgrounds. It is easier to get news if you are with others.
There are a lot of fire bans out so ask before lighting.
BC has had some insane heat this year so stay hydrated
And most of all enjoy, it is only a small part of the province that is "threatened" by the fires and the rest is as amazing as ever once the smoke clears. Those in the tourism industry still need people this summer so enjoy.