This is sort of a technical question, as I'm trying to figure out when the decoys would be decoy-ing but:

John won't mask the bar code signals until after the draftees are gone, right? Because once news of the draft hit, it would be suspicious if half the village went out like that (plus some of the original decoys themselves could've been drafted).

Tl;dr - the plan is probably not a go until the draftees are gone, yes?