[Suggestions on what to include in a GC backpack]

For those that cache in the South West - especially Arizona, the space blanket can serve two purposes - the one it was intended for, the blanket - and an alternate emergency use - to wrap yourself up in if you disturb a hive of africanized bees. There are no European bees left in Arizona - they are all africanized now, so I have a space blanket tucked in the belt pouch of my Eberlestock hydration pack, especially whenever I'm caching East of the Salton Sea. It could literally save my life.

 

Spaceblankets are a must for any kind of outdoor pursuits, in addition to the above another way they can come in handy should the worst happen is as a signal if you need to be found. Lay it out on the ground with a rock at each corner and it'll reflect the sun for all the sky to see, place your torch (flashlight) in the centre at night, particularly if it has a flashing beacon setting.

 

You can also use them to hold water, and even collect water by catching ground condensation overnight (you need a tin/mug/bowl to place underneath).

 

For something that is so light and takes up so little room they are so versatile they are a must-have if there's any chance you could end up stuck somewhere.

[Any hints on improving our unobtrusiveness?]

"We use billion dollar satelites to look for tupperware in the woods, what's your hobby?"

 

That made me laugh! I like it, I'll use that one!