This one shouldn’t be difficult at all. The “bandit landmarks” are the corpses strung up on plywood or the like literally pointing in the direction you should head. Just follow the rigor mortis cadavers that are scarecrowed. You’re golden.
If you go the wrong way or fall off / climb up in the wrong place, you’ll have to go all the way round again. But you should have a waypoint on your map anyway, just follow that.