I got the ratchet, a scarf of the right material, a tie down belt and I tried to find some small plastic containers/objects. I found some old, small cellphone chargers of the right size and weight. I guess these things looks innocent enough to be put in a random little backpack or a small bag. Guess this method needs to be practiced a lot before ctb'ing using this stuff, but the phonechargers are actually very useful.
I have been searching for an in-depth thread on the night-night method for a long time.