I've gotten the shacks at the base of the drawbridge all...er..
I was also able to get the floor of the ruined building laid down around the shacks and walls, I used thin card for all of the flooring, and most of the shacks' walls. The corrugated card is from the inside of coffee cup insulators. For the grating on the floor I used black plastic canvas.
With the base of the drawbridge mostly finished, it's now time to move on to the drawbridge platform and the bridge itself.
Cheers,
CJ