There will be gas in White Pine at Kontenka, but it's been 87 octane, which I won't use. What I would do is bring a couple of 6 gallon cans of it and use that only in an emergency. Otherwise, always fill in Bergland or elsewhere before heading home for the night. Bergland is straight down trail 1 about 18 miles or so. Worse case if you're near empty in the morning put 2 gallons out of your 6 gallon cans and head to Bergland.
I'm not sure if you've stayed in SC before, but snow is very thin there due to being so close to the lake. A few miles inland and it begins to pile up! Great trails leading out of SC too. Have fun!