a. For delicate souls like me, a 20-degree bag was just fine.
b. I've been up a bunch in the last ~five weeks and have only been soaked once, but rain's threatened almost ever time - I always assume a sprinkle and pack accordingly. I have not liked relying on Strawberry/Pine forecasts.
c. There was some noticeable fire damage on that nub of the 139A that leads to the Pinchot trail head, but I didn't see anything I'd characterize as significant damage on the outer loop trails, or Houston Bros. It's been beautiful all late summer.