Pollen can travel a very long distance...miles, but as the distance between donor and recipient increases, the probability of pollination diminishes greatly. On the herm plant, if their are lots of male parts and the pollen is viable, you will likely have fully seeded buds. If you separate the herms from females by 100ft, you'll end up with some seeds in the fems, but not fully seeded buds. If you double the distance to 200ft, there will be far fewer seeds.
I'd guess the available pollination probability density at a given distance would decay at a rate of 1/(distance^2) or faster. That's not taking into account the air flow.
Consider the prevailing winds. If you put the herms directly upwind of the females, then that increases the probability of pollination.
Will this pollinate something indoors? It's possible, but the addition of a physical barrier reduces the probability even further.
Bottom line, put them downwind and as far away as you reasonably can.
