I recently started shooting transparency film in 120 and 4x5 again. Not a lot, just few rolls or several sheets from time to time. Alas, both of the pro labs that were convenient to me have gone away. Looks like the only way to get processing is to send it out.
Unfortunately, as far as I can see, packaging and shipping costs for the two-way trip will wind up costing me more than the film and processing unless I hold my
film and send larger orders.

Does anybody have any tips for dealing with send-away film processing? What is the cheapest carrier? How can it be made cost effective? I'd rather spend my money on film and processing than on postage.