yes it's doable. just keep your itinerary somewhat flexible so that if a storm hits, you can just wait it out a day. don't attempt the coquhalla if it's snowing. only drive during daylight hours.

Since you obey the speed laws, shoudn`t you also obey the law that requires the use winter tires or carry chains until the end of April on the highways you will be using?

I didn't know that they are required on the transcanada, or any highways getting there from vancouver... I've seen those signs here in Sooke, VAN ISLAND (before winter came), but I don't recall seeing any on the drive here, and will be driving the same highways back...
If you could be more specific ron, I'd appriciate it.

http://www.th.gov.bc.ca/SeasonalDriving/winter_chains.html

Click on South Coast Region and Southern Interior Region maps. I don`t believe there are any highways past Hope where the winter tire law does not apply.

Just Go!

Would you consider driving to Seattle and then across the US through Chicago and to Detroit crossing back into Ontario in Windsor? The gas prices might make it more economical.

Yes! You'll be fine!! No winter tires required. Have driven several times, even in February, without winter tires, no problems.
Of course, use common sense. The are occasional storms that may start out with rain and end with snow, so keep your eye on the weather forecasts.
As ltt mentioned, the Coquihalla is more of a worry than the Rockies. That road is at a high elevation and closer to the coast where wet weather and fog are much more likely.

If winter tires are out of your budget, have you priced out chains?

THANK YOU EVERYONE!
I've done some more research, and will be headed back soon with some chains in the trunk, as they are most affordable!

I would have driven through the states, but accidentally let my passport expire, and time and money is very tight!

Thanks again!!