The better route at this time of the year, is to use the Trans Canada Highway, Hwy 1, as it goes to Hope as well,(and the Lower Mainland) With the Coq elevation at 4,400 feet, and Hope at about 200 feet, you have a lot of hill there, bur half that on that stretch of Hwy 1 (not sure of exact elevation). The Coq has problem in summer with overheated vehicles, and the steep, long runs down hill, sometime tax the braking of some vehicles. If you require stopping to visit some place off the Coq I would drive from Kamloops to Merrit through to Priceton. On the Hope Princeton there are some steep, high areas, and a steep hill going up out of Princeton and a long one not as steep getting close to Hope, make it not a really good option for winter driving, either. The No.1 would be my route to the coast. The road going through to the Pemberton and Whistler areas has a very steep hill constructed with a switch back and at least a 15 % grade. Not good. Even in summer the brakes take a beating going down that hill unless you have an exaust brake in a diesel, with a heavy load.