Vancouver to Whitehorse road trip July/August
 

I am planning a road trip approx 12 days drive Vancouver to Whitehorse return. 3 star motels are fine. I am thinking 5 days drive each way and 2 days in Whitehorse. Possibly 1 day daytrip to Skagway Alaska.
Any suggestion would be appreciated.
71 year old man but reasonably fit.
Thank you
Warrsher