IMHO - possible. But do note, your family obtained their visas as part of your successful application. So better make sure your dependents have everything (documentation) they need to show the CBSA officer processing their 'landing'. Make sure - they have your contact numbers, IDs and your current residence address when they follow you. Should you already have IDs in Canada (Driver's License, provincial Photo ID) - send them copies for reference, just in case.
More on arriving here: http://www.cic.gc.ca/english/immigrate/provincial/arrival.asp
You can also post on the "Landing Experiences" threads for more info...http://www.canadavisa.com/canada-immigration-discussion-board/landing-in-canada-all-you-need-to-know-t36735.0.html
/hope this helps....