"Out of the woods" >> to continue having difficulties although a situation has improved.
The financial situation is improving but we aren't out of the woods yet.
We are having problems with staffing and hope to have new recruits soon, but it is difficult to see when we will be out of the woods.
I do not think it is a phrase easily used in relation to too much work. How about you give us a sentence in which you think it might be used.