Yeah Whistler and Van aren't getting anything close to winter weather this year. I hope it's cold enough to wear my Canada hoodie, toque and mitts when I get there!
At the completion of the end you want to have the rock that closest to the middle circle. Ideally you want multiple rocks that are all closer than any of your opponents rocks because you get points per rock. However, only the person with the closest rock gets any points and any of your rocks that are outside your opponents closest rock are worth nothing.
Acuracy is the skillset. Nixy told you how points are counted...but it's not easy at all to not only control the speed of the stone, but it's curve..impacts, deflections etc etc...