Hey Ben,
Glad that helped you out some. I'll be making most of the Cross Canada trip myself this summer. I'm getting a bit a later start than I'd like heading from Boston up to Nova Scotia (and if I can get more money, New Foundland) before heading West to Seattle, stating in Mid July. I expect that I will stay in Canada most of the way, though have been seriously thinking about dropping down into US after the Great Lakes. But then there is no poutine! So this is a problem.
When you hit Banff/BC/Rockies go to hot springs! Radium Hot Springs is just cool as hell and it feel swell.
As far as selecting a touring bike, there are lots of posts in this forum, some getting rather passionate, about which bike is best. You should look at those and see what other folks specificy as far as bike types, gearing, components, and what not. There is a lot of great info there.
Here are my two cents:
TWO CENTS: Buy the bike that feels most comfortable. Try to forget about the cost. Ride as many touring bikes as you can find in your town. Don't forget to look at used touring bikes. And then buy the bike that feels most comfortable.
I ride a Rodriquez tourer www.rodcycle.com, but you know why? Becuase when I went to the store, I did not want to give it back to them during the practice spin. I was not, like, eh, this feels tricky to ride, or eh, this is all right...I thought, "Do I really need my stuff and car at their store???" That is the kind of experience I hope you can find when you try out the different bikes. This bike was out of my price range: I handed it back. Went for a few more "practice" rides and ate beans and rice for a couple more months. It was that kind of sacrificing love. It is the kind of practice ride experience you are looking for.
My partner is looking for a new touring bike. We are riding everything from $200 used Raliegh tourer to $3000 Co-motion. When he finds the bike that feels best, that is the one we will bring home (eventually if we have to save more money..um, like the Co-Motion, and I refuse to eat beans and rice again for someone else's bike...)
Good luck on your trip.
Drop me back a line if you've got some Canada tips and things not to miss. I am a notoriously on the road planner and will more than likely just wake up on the day I am leaving with only the vagusest notion of where I am going or what I will do when I get there.
Knox Gardner
www.bikenerd.blogspot.com