How to build a camper in 10 simple steps Step 4: Building the Walls Head to our YouTube channel @wandertears to see the full video! You’ll notice in this video that there are a couple different methods you can use. 1. Using our grid system, mark out the curve of the camper and cut by hand using a Jig Saw. 2. Have a CNC do all the precision work for you. If you go with option 1, you will be offsetting your seams. With option 2, you’ll have more of a jig saw puzzle assembly, and all seems will be