Thanks for that site! I definitely will look into it. I'm pretty apprehensive about adding stuff to my rig that will make it less mobile, since that's kind of an important part to it, but I'm sure it would come in handy. Again, my goal is to have most of my portraiture be slightly journalistic in nature.
Thanks so much for the advice, everyone! I think I need to find a different lab for my 120 stuff!