Avoid broken tools and repairs by having all tools in top notch condition with spares and parts if possible. Put the barrel at an angle partially below ground with at ridge pole between two tripods to hold the other end of the pole up while soaking. Or bury the barrel 90 degrees in the ground and stand the poles on end, be sure to back fill and tamp to prevent toppling if in soft ground.
Main idea is for the shelter to last for several years rather than several months.
This requires more work and materials. It is wider and longer, 6'x16'. Polyethylene plastic sheeting wraps the walls and all pole surfaces to prevent wood rot and control humidity. Use length wise poles on top of main crosswise roof poles for backup and to transfer more wieght to the larger cross poles and to contribute to the lower density in the middle of the roof. Utilize the backhoe.