I'm looking for a field bag, for relic hunting that is about half the size of a day pack, straps to the waist, optional clip on shoulder strap, couple of small zippered front pockets, main compartment (with fold over cover) divided in half, one side with open pocket for pinpointer and space for a water bottle and extra batteries. Other side of main compartment for junk, etc. Loops or slots on outside to stick a web belt through. Ideas?!