We visited the Big Island less than two months ago and stayed in the Puna area. The Volcano is a major attraction for, and we don't care much for the hustle&bustle around Kona. If we were to go now, I don't think we'd cancel but probably focus more on activities north of Hilo or even in the Kohala area, trying to be upwind of vog. It's a big island and there is much that can be done, not the whole island is a disaster zone, and witnessing the eruption may provide an extra thrill for some as well.