可能ですよ。国内で待っている方もたくさんいらっしゃいますし。日本のカナダ大使館のサイトに、次のように書かれています。
Question: Can I visit Canada during the processing of the application or, if I already submitted my application, can I go to Canada and wait for my visa there?
Answer: Yes, you can. You will be subject to requirements applicable to visitors. You will normally be granted a stay of six months upon arrival in Canada. This can be extended for another six months. When your visa is ready the visa office will contact you. If your application for immigration is not finalised before the end of your authorized period of stay you will be required to leave Canada.
http://www.canadanet.or.jp/i_v/im/fcqa_e.shtml
パスポートの提出先や面接先(まずありませんが)は、変わりません。ビザオフィスに必ずカナダの連絡先を知らせておいてください。