hikermor: Signal mirror: A space blanket has one unique feature that most man portable mirrors do not. You can spread it out over a couple of plants or improvised stakes and get under it to keep the sun off you...also, having experienced the heat stress and almost heatstroke, the fine motor skills that I believe to be necessary to operate a mirror..aren't there. The space blanket it big enough and faceted to attract someone flying at 1500 feet and 80 knots. I'm not certain about operating a mirror under the same conditions. I've been told a space blanket does a pretty good mirror impression. But, I don't have first hand knowledge observing the results from above.

Also..bandanna..recommend against the CamoRambo..get a red or orange one. Much easier to see.

As far as being seen..no non-electronic device will help you more than a good small smoky fire. Often during the mornings there is a no wind condition for awhile.
A couple hundred foot column of grey/black smoke will be investigated quickly.

Your results may vary.