And it was fantastic. You can get 91 oct just about all the way up. We went to Skagway and hiked the Chilkoot trail. We had a rough spot on the way back when we took the stewart Carthey hi-way, ran out of gas and ended up pumping purple from a rusty can from a gold miner of all things. Do the trip don't worry about your ML it worked perfectly! You can check out this link for pictures from the trip including my ML.
www.furgasonhomes.com/chilkoot