Ok, I've got the hopefully clean holders and film. I'm off to Europe soon(Amsterdam, N. French countryside and then Paris) and I'm going to be shooting more than the stock of film holders. Hence I'll have to change them out somewhere, but more so, figure a way to store (and label?) the exposed but unprocessed film till I get home. Should I just save the foil envelopes and put the exposed ones back in there with the unexposed ones, say with a rubber band around them to identify the exposed ones? It'd work, but no real way to identify individual sheets. I'm sure there must be a more logical way. So, how do people store and travel with sheet film?

Thanks as usual!