Kswan, try Fort Ticonderoga. Also do some searches for a guy named Gary Zaboly or George Bray or Tim Todish. They may be able to point you in the right direction. They're all on the web somewhere.
Gary has an amazing eye for detail, George once showed me several original documents from the 55-58 period, and Tim has maintained the oldest Ranger re-enactment group in the field.
I remember seeing one with a compass in the butt, rather than a picture of one, but BE CAREFUL. Sometimes you can be led astray. These guys will be able to help you. I also remember learning that some of the rangers liked carrying charges rather than horns into the woods, in spite of what some of the contemporary sources pointed out ( quite possibly bullocks horns were an exception rather than a rule?)
It always seemed easier to trek with charges over horns and smoothbores lend themselves to that....sometimes...