As soon as the flock turns, hide, but keep flagging. Most laydown blinds have a hole in the side specifically for flagging with the cover closed. You don’t need to flag nonstop. Instead, watch the birds; if they start to slide off, flag to keep them coming. Tone your motion down, and it will resemble birds hopping over one another to feed or stretching their wings. One or two flaggers is usually enough for Canadas, but with snow geese, numbers matter; the more flags you’ve got going, the more realistic and attractive your spread becomes.