Engine balancing questions?

I would like to gather as much info on crankshaft balancing as possible before I drop off my short block internals, so I don't look like an idiot if asked any questions by the machinist.
1-What parts do I bring with me and does the dampner, keyway, and lower chain sprocket need to be installed?
2-How long does it take, I would like to watch?
3-How are bobweight weights calculated?
4-Is there any chance the journal surfaces will get damaged during the "spin"?
5-Anyone know of a reputable shop in the Pa./Delaware/N.J. tri-state area?
6-Any info would be greatly appreciated!