We spent 3 months up and back in 2011. We did use some of the books mentioned. Milepost usually gets published each spring, but the 2014 version will only have a few changes in 2015, and you can get it now.
Only drive on the top half of your fuel tank, fuel may be difficult to get past the large cities in Canada.
Take your time and see the sights, it is a trip of a lifetime.
Consider taking the ferry system to Juno and south, only way to see this unless you have a plane or your own ferry. Totally different scenery and experiences. It also reduces your time in western Canada, and you will not see a whole lot different scenery than you saw on the way up. You can then come back by way of Washington and Oregon.