The road is not suitable for caravans , trailers and large trucks because it is steep and winding . At McKillops Bridge the road which crosses the Snowy River near its junction with the Deddick River . The road is designated unsuitable for caravans , trailers and semi-trailers due to its long , narrow , and steep descent down to McKillops Bridge which crosses the Snowy River near its juncture with the Deddick River .