John-
thanks for your time and advice. i really appreciate it.
its looking like a battery pack will be the best option, because we will be able to place the light where we want, and take the time to make it look good – off axis.
looking in the B and H catalog, it seems like the bescor slm-10atm might be a good choice (8.6AH) with 1 hour of run time at 100w.
it would be great to use the mole teenie weenie to add filters, etc. but i fear that the 600w light would burn through our battery pack too fast?