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As a replacement for the band-aids (and an alternative to duct tape), I'd suggest Leukotape. If you don't remove it yourself, that stuff can stick for a week or more on the trail. Amazing stuff.
Don't take the whole roll. Use some sticker/label paper, cut some pieces, and stick them to the shiny side of the paper, like this example from Andrew Skurka.
Sorry here are some links - The Leukotape is for blisters and the Dukoral is an oral vaccine for the prevention of ETEC/diarrhea ( "Montezuma's revenge" ) and Cholera.