Thanks for your reply. Yes 4 days. According to google maps it's quite doable. Day 1 calgary to lake louise. 183km, 2 hours. Day 2 lake l to jasper 233km 3 hrs, then on to clearwater, another 3.5hrs. Day 3 clearwater to kamloops 1.5 hrs then kamloops to whistler 4.5 hrs. Day 4 from whistler to vancouver is only 2 hrs. Total distance comes to 1275km or about 800 miles. We have covered 2000 miles in 6 days in a previous road trip! Sunrise seems to be about 6am and sunset 9pm so plenty of daylight.