The mountain pine beetle population is really widespread. I don't think the fire would burn all the area infested. Cutting and burning trees is one of the approaches, although generally the beetles have already left the standing dead trees.
If those trees are burning, it's not going to control the population. The green trees where the beetles are first attacking that are on the leading edge of the infestation you'd want to cut and burn. If the tree is already dead, it's too late.