If you use insert a plane for each of your sketches (something I learned from Big Seb). All you would have to do is move the plane to a new face. I do this religiously now. It has saved me quite a few times.
Be careful putting all sheets into one drawing file. I had a part corrupt a sheet and could not open the drawing file anymore (had about 20 drawings in it). I keep all my drawing files separate on large builds. Then merge them as a single PDF.