It is rare to see a figure posed in a trench that looks in scale but I do think you have done it here.
They were big and the sapling revettment and weathering works well too.
A nice change from corrugated steel and wood planks.
If the reader is not familiar with the way fmargem's trench is constructed, I'm posting some on-line articles on the subject in the Lounge forum.
All the best,
Dan