Went that way this summer (headed North), July it was. Took the Cassiar, wanted to go the other way, the road was good, mostly paved, minimal traffic. There was some construction with minor delays. We stayed at Meziaden Junction, and Boya lake provincal parks, two of the most scenic places we stayed in a 4 month vacation trip. Prices were good too. The worst road we saw was from the US/CAN Border on the AKHWY to Tok, what a lousy chunk of road. Worst trail called a road was the "top of the world highway", lot of nerve calling that ox trail a road. From my observations, speed is the determining factor for vibration damage and flat tires. We had no flats, truck or trailer, but we did have to have a cracked bracket welded on the trailer when we got to Whitehorse YT. Go fasters and trucks wih P rated tires were the ones I saw with flats. You can't have too much rock protection on the vehicle or towed unit, and put a bug screen on the grille to protect radiator/condensers from rocks.