I've used drywall sheets for years and I used to do a lot of building. Yes you can pick up a sheet with something on it as long as you set it on something else that is flat.

Drywall is easy to work with and sometimes you can get a broken piece from Home Depot, Lowes or a lumber yard . When you get it just measure out what size you want, lay it flat and cut one side with a box knife then stand it up and cut the side that you didn't cut . Once cut on one side the other side will bend so you can see where to cut. NOT a big deal, you just have to do it.

Once you cut it take some tape ( any kind ) and tape all the edges . If you don't you will have a white streak across your belly . lol

You can put pins in it and cut on it as long as you don't go to deep . I used to use one side to build on then flip it over and do my covering on the other side. I did this in a 5th wheel for 12 years. And yes I think you are over thinking the whole thing. ENJOY !!! RED