I realize now that it was silly but the first thing I did was to call AT&T and ask them.
Their recommendation was to upgrade to their unlimited everything plan and almost double my plan cost.
When I asked them about the $10 per day choice they said the I could do that if I really wanted to but I should upgrade to their unlimited everything plan.
I politely hung up on him and continued my own research.
What I found is an unadvertised offering called Canada Roaming Bonus.
AT&T is now offering a Canada Roaming Bonus much like the Mexico Roaming Bonus. It offers, like the Mexico package, unlimited voice/text while in Canada and 1 GB of data per month. The kicker is it you have to call the AT&T Rententions department to have it added to each line. The regular first line Customer Service Reps can not add it to your line(s). I know its available to Mobile Share Value Plan members. Not sure about other customers.Oh, and it's FREE. Wonder why the representative didn't offer me that?
Make sure to add the $0 cost International Roaming to your plan at the same time.
While you're talking to the Retentions representative, ask them if they can bump up your data. They bumped my plan by 5GB for free.
Here's what shows up on my bill:
Canada Roaming Bonus - Includes 1 gigabyte of data in Canada; data overage is $20 each additional 1GB. Unlimited text sent from Canada and unlimited talk from Canada to the U.S. and Canada. Talk from Canada to other international destinations will be billed at standard international long distance rates. Pay-per-use rates apply for all services in all other international countries. For more details, visit att.com/global.
And this is full speed LTE, not 2G like some other carriers.
The Canada Roaming Bonus worked perfectly for me in Canada. I did have to enable data roaming once I got to Canada. Don't forget to turn it off when you return.
You can't beat the price.