We did the Top of the World in July. At times plowing through half a foot of mud and visibility down to 100'. Slow going to say the least. I almost locked the the front hubs in the morning we departed Chicken for Dawson City but opted not to. Wished I had by mid day. But we made the crossing. We stopped about 30 miles from Dawson to clean off the trailers taillights and rearview mirrors.
Then gave the entire rig a power wash once in Dawson City so we could touch it without wearing it and see out of the windows.
-George