I recently processed some film from a recent shoot and found minute dust spots on the film. Before I load the film I blow out every film holder with canned air and load the film in a clean area. I was wondering how everyone carries their film holders the field. I've been keeping mine in ziploc bags, one for color transparancy and one for black and white. I want to eliminate any chances of dust getting onto the film before exposure. I want everyones personal opinions. Thanks!