Well done. In Fabrication circles, I believe your bending jig is referred to as a sheet metal brake. FWIW. These would be great in alpine zones or on glaciers, why not just use sticks below tree line? dig, run guy line under stick (perpendicular) bury, stomp, let set, tighten. In the am, just pull your guy cord, leave the stick and move on. 0 cost, 0 weight penalty.
When the trail head vehicle build comes up, let me know, I can spin a wrench and even burn some metal with the 'ole mig welder.