I was up there riding yesterday. Drove to 14 km and rode to 16.5, just a shakedown ride with a new/used sled. Supposed to snow every day this week.
If you want to go up the Sukunka you definitely need RR18A as the coal trucks will win every time on a one lane road
Try Tumbler Ridge, Hasler, or Pine Pass. All closer than Barkerville. TR has soon very good and easy access hills and trails in the Babcock and Bullmoose area's