I'm looking for the best ski boots/skins to load sleds in and out of my trailer. What are the best for wide mountain sled skis and trail skis? I know skidoo uses them on their demo sleds to pull in and out of their trailer but I don't know what brand they were. They had a pin that on both sides of the spindle I believe. Not interested in dolly's or trailer mounted glides. Thanks in advance!