I've rigged a few traps this way. my plan was to keep my animals out of sight, hard to explain the situation, but i'll try. i used 1/8 inch cable 10 or 12 feet long, staked on both ends, using a common swivel/drowning lock for the lock. it will work, but, takes time to set. i only used them where the road-bank was steep on the down-hill side. basically, the same as a drowning set-up for beaver, without the water. last winter i trapped the same area that i'm thinking about and set my traps on drags, at some locations i wired a RR tie-plate to the drag and tossed it over the bank. a fox or coon couldn't pull the weight back into the road. they would go downhill till they tangled. it was a semi-public road, but i could rig the trap, make the set, toss the drag over the bank and move on. every set is different, i like wooden drags also. hope that gives you something to think about.