Harness for pulling baby/gear carrier over snow

Gday,
Im going to convert my existing baby carrier into a sled. Its easy enough to do with some second hand shop skis and a few bolts.
The problem is how to attach it to myself so it doesnt run me over on the descents. Any ideas on how I might create fixtures to my pack (or harness?) to the buggy? Im thinking I could use some small diameter pvc pipe with rope going through it to stop it overtaking me.
Just so you know Im a down and out outdoor educator so theres no way I can afford to just buy one!
Im going to convert my existing baby carrier into a sled. Its easy enough to do with some second hand shop skis and a few bolts.
The problem is how to attach it to myself so it doesnt run me over on the descents. Any ideas on how I might create fixtures to my pack (or harness?) to the buggy? Im thinking I could use some small diameter pvc pipe with rope going through it to stop it overtaking me.
Just so you know Im a down and out outdoor educator so theres no way I can afford to just buy one!
