Well, I do have a meter at home that can probably tell.
38 amps is about right for a bike (for reference - a lot of cars ar 90 amps with a lot more crap running in them)... One thing I want to do is convert everything besides the headlight to LED's, since their current drain is miniscule by comparison. That will free up a lot of juice for other things.
If you're taking the HD then I definitely have to take the hawk, can't be having an HD with the best sounding pipes in the group... What do you have electrical-wise on the bike right now that's non-stock?