From time to time, I will do field work involving recovery of fossils and paleontological materials. Usually these excursions involve a fair amount of hiking, such that versatile tools not too heavy, are a real advantage. I have been using a small (7 in) pry bar roughly similar to this: http://www.2daydeliver.com/product_detail.php?id=SKUB00002X1XS#.Vuw4CUe2Elk

It is reasonably light weight, probably about 2 oz, and I find it very versatile for digging and prying. I will be carrying it more frequently as part of my general outdoor gear, primarily for those situations where one might use a large, really tough (and fairly heavy!) knife. It will work together with a 4 inch blade that will do all the cutting and slicing. If I ever felt I would need to, I could grind an edge on the pry bar and baton with it.

Google "pry bar" and you will find a lot of variations on the crow bar, many of which would be useful in various emergency situations. Some just might be suitable for your circumstances.

For a small pry bar, that's a very good one.

Vaughn 5 1/2" Mini Bar Nail Puller in my tool kit is similar and a bit smaller.

We have several of these pry bars in different sizes - from micro to very large. They all came in handy when demolishing a plaster-walled bathroom in an old house during remodeling. And in removing molding in a different renovation. Those, and a Stanley Fubar and a Dremel Saw-Max and a Rockwell Sonicrafter F30 for the heavier stuff.

Prior to this remodeling, we never owned any pry bars. I wish I had recognized the utility of them earlier in my life - they are really handy and you find uses for them all the time. Big and small.

Hard to argue against.

Wonder if could use it as a removable pan handle too.

IIRC Stiletto make titanium 5 & 7 inch prybars if wanted to try and get lighter.

For amazon users the identical bar is available for $4.49 as an "add on item."