Thorongil was wary of the whole notion, though every other man seemed content and even comfortable, including Imrahil, and protest would change nothing about the situation.
You are being ridiculous - it cannot be that difficult. You have slept in a tree!
Thorongil studied the contraption, remembering how he had seen the other men manage. They backed into it, as if sitting in a chair. None of them climbed into it as one would a bed.
There was nothing else for it – he could hardly sleep on the deck. Resigned, he approached the hammock, and gingerly lowered himself toward the canvas.