If the campground were in the vicinity of the wildfires, then I would agree.
But the campground is not. It is somewhere between the OP's home and Lake Amanor. There may be only one or two people with reservations at that campground affected by the Dixie fire. And staying at this campground is not affected in any way by the fire (eg, he isn't going to be subjected to smoke).
So the cancellation is due to the OP's personal circumstances just like if someone died, etc.
Had his destination been anywhere else, he wouldn't have needed to cancel. And his not going to Lake Amanor doesn't affect his ability to stay at this campground - it just makes it unnecessary for HIM.
