Hi
You can travel whatever you like to Canada as you do not need a visa. You just have to obey the 'normal' rules as a tourist (e.g. return ticket etc). There is abolutely no need to tell VO and I do not believe that (even if they write you) this will affect your visit in Canada (one way or another).
This was already discused a couple of times here on this forum (not in this thread), e.g here (some user reporting there to sucessfully travel to Canada while waiting for PR):
http://www.canadavisa.com/canada-immigration-discussion-board/going-to-canada-as-a-tourist-while-waiting-for-my-permanent-resident-visa-t101625.0.html
I also know someone personally who did this very sucessfully. So, and now since I provided you with this information I expect you to bring me something from your journey to Canada
Have a nice trip and enjoy your future home! ;D Don't forget to come back for your PPR ;D
Miki