We're planning a road trip from calgary to las vegas in december. Can you give me some ideas and what to watch out for with respect to road conditions. How bad could the roads get on the I15 at the time. what's the safest way to travel. how long would it take us to get there. would we be able to drive 8 hours a day at this time of year. Any suggestions would be appreciated. What are some affordable hotels to stay in.