The key questions are: What do you plan on doing there? How does Rafi behave on such trips?
You'll be limited traveling with a 2 year old to the Canadian Rockies. Most of the attraction is the scenery- lakes, hiking, boating etc... and the driving! I know that my two year would not behave on such a trip! She doesn't last in the carriage or car seat for more than 5 minutes!! If I remember correctly, most of the basic paths/ trails can be done with a stroller. Also, some of the lakes have a special handicap access (I remember this for Peyto Lake forsure- however, you're compromising on the view by using it.) As far as attractions: find out if there are any restrictions... I did a quick search- Banff Gondola and the Columbian Icefields allow little ones onboard. Not sure about boating- are little children allowed on canoes, kayaks etc??