I have a few of these. Just the dosimeters, not the charger. They are
pretty cool. It has some sort of leaf scheme where the are spread
apart by the charge, then as you get nuked the leaf moves. The scale
is so high you would never see them move in real life.
http://tinyurl.com/ycojy54

This is a radsafe meter, but also not very good for poking around the
range.
http://tinyurl.com/ykfnp4a

About the hottest spots I've ever found are around 100uR/hr out in the
California desert, and around 50uR/hr around Queen City Summit.