As a child, I used to dread the walk from the parking lot to the ski lift. Walking in ski boots was never a lot of fun. As a parent, it is even less fun - because you are usually carrying excess (kids) equipment.
The sled is a good tool for toting really young kids and their gear, but it isn't the easiest thing to store if you are actually going to ski for the whole day.
We have found that the Lil' Ripper Gripper works pretty well as a towing system to transpost the kiddos and their gear to the hill. Just put on their skis and use the retractable leashes to pull you lil' ripper to the base of the hill. No more coaxing or promising of hot chocolates!