We are traveling to Quebec from Ontario. Is data and SMS nationwide? Can't seem to find that information anywhere, and the automated chat only addressed long distance calling.
It should be indicated in your plan info.
Contacting Customer Care and asking after a couple of hours wait on hold is probably your best bet for a concrete answer. Most newer plans do include nationwide texting and data where some older grandfathered plans do not. If your calling is limited to Ontario, then it is a possibility that your texts and data are as well.
Have a fun and safe trip!