Check before you go best to have the latest news
Redwoods should be fine, but there was a new fire right near McArthur-Burney SP yesterday. Your best bet is to call the rangers for the most accurate info. You should have contact info on your camping reservation.
We were at Redwoods in Cresent City and it was not bad but in the Sequia National Park the smoke was pretty heavy in the morning, I am not sure exactly where you are going so maybe call the Park Ranger station in the area and check it out before you go.
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