Just make a couple of notches on the top of a 5-gallon bucket. Set the pipe in the notches, and you have a stable spot for sawing. As a bonus, you can load up the bucket and carry your tools along ...

These considerations make it very portable and perhaps backpackable as well. [Figjam] took a 5 gallon bucket, wrapped the inside with two layers of swamp cooler matting, made a loop of hose above ...