you are blowing my mind man. your narrative is worse than those crazy drawing with the solid line and the bold lines and the dotted lines and the arrows and the steps one through fourteen woven into a story about a rabbit and a tree and a burrow and a tar baby. how about a darn picture, or three. kidding. yes, a friend of mine just whips out some webbing and presto....skis on back, one pole in each hand. I'll get him to teach me this year; I'm a poor knotster.
You can make a slipknot using a double figure 8 loop and then running the webbing back through the loop. Use that at the top near your shoulder running with the webbing under the toe piece of each ski. This will hold the weight of the skis. Then have something like a taught line hitch on the under arm side which you can adjust and use to keep the webbing tight.
Or just do two slipknots and get the length of line dialled.
Google for the knots.