I live in Hay River NWT and go to the Yukon every chance I can.
Last year I drove my 83 CJ-7 over to the Yukon, down through Watson Lake, Dease Lake and came out at Kitwanga, then did the tourist trip to Vancouver island, Duffy lake highway and then home.
I have travelled lots in the Yukon, and if you have the time you should visit Dawson City, and there is a loop from Whitehorse, to Haines Alaska, a short ferry ride to Skagway Alaska, then back to Whitehorse.
There is also an incredible road from Dease lake to Telegraph Creek. ( 130 kms mostly 1 lane gravel and lots of mountains.) Very few services at Telegraph Creek, but great scenery.
I have only a 54 liter fuel tank but did not have to use my jerry cans at all for gas.
Plan on staying a couple of days at Liard Hotsprings. There camping, motels and food/gas there.
If you have any questions email me @ hrfd_30@ hotmail.com
John