Assuming one isn't too incapacitated to crawl around and collect fuel, smoke signals might just work better than the 11-oz. PLB. Certainly lighter weight! Especially in times of high fire danger, guaranteed to get attention (Smokey Bear pops out from behind a tree wielding a shovel....)!
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey