Slot the ends of a couple lengths of plastic pipe to spread the wires as a companion might do, toss pack and your expensive shell/insulation over and crawl through. Pop the pipes loose and keep going.
Probably not much lighter than the metal step, but it works on all kinds of fences. Cheap and stowable on any pack with side pockets and compression straps. Drill and add a line tether as needed.
IMHO, 8 ounces for a metal casting that will support your weight on a small point is getting off easy.






