In addition to heading north, I've taken the Yellowhead Highway a number of times.
Although the scenery is not spectacular, it was usually fine.
Plenty of services at Hazelton, Smithers, Houston, Burns Lake, Vanderhoof.
(Plus a couple of spots in between)

The worst stretch is approaching Prince George, but you will have a long downhill into town.
Old Hazelton off the highway has a fabulous campground at the junction of the rivers.
Plus there is the historic K'san village.
Campgrounds in most of the above towns - although they may be closed by then.

Highway 97 is another story. It has a good deal of traffic,
but has shoulders in many places as the highway is improved.
Still, I don't remember it fondly.

Best - J