Depends on what sled you have? A buddy of mine made the best solution ive seen, he cut the bottoms off some boots he bought for like 5 bucks at a ski swap off and created a little platform out of wood with the boot bottoms sticking up(at an angle so that his skis wouldnt get in the way)... if that makes sense. That way if he rolled his sled his skis wouldnt break... have also seen people rig stuff up with snowboard bindings. I usually just attached them on my backpack and it wasnt the best going through trees, but they werent in my way when im switching sides and shit.... Get creative and youll make something work im sure!