Head up on the Alcan. Great scenery in the Muncho Lake area. Travel south on the Cassiar but pay attention to the road from the junction to Dease lake. It can be narrow, curves and potholes. Very doable but just pay attention. Also pay attention to fuel as can be quite expensive on the Cassiar and Alcan north of Fort Nelson, reasonable in Whitehorse.
Prince George has all the same services as Kamloops.
If you have the time take a run down to Atlin, very beautiful area and rustic old town. There is a campsite right on the lake. It is a side by side gravel site but right on the water with an awesome view over the lake and mountains.