Re: Portable shooting/hunting bench
Along the lines of stiffening the setup, I used 2"x1/8" square box stock to make a triangular welded frame for my table. Then just 1 sheet of plywood bolted to the top of that is the surface. The legs are splayed just as everyone says, I took pipe flanges and welded them (using a shim to angle them) right to the triangular framework. This setup is not quite as solid as the concrete benches at the range, but so close I'd be happy to shoot off it in competition if I had to.
If you have something that you disassemble and reassemble enough times, sooner or later, you'll have two!