The Canadian federal government shops out GST tax rebates to a private
company called Premier Tax Free.  Any foreigners visiting Canada with
the intention of reclaiming their eligible tax should visit the web
site before leaving:

   http://www.premiertaxfree.ca/

The mail service is very slow.  We filed for rebates for a trip to
Quebec on August 24; the check arrived just before Christmas.  Out of a
retail amount of about $750, we got $20 back.  Premier Tax Free takes a
healthy 18% service charge off every claim, besides whatever they're
making off their contract with the government.

Some of you may decide it's not worth it. . . .

Perhaps you can do better if you cash in your receipts at the border.
Be sure you use a border crossing that is prepared to handle such
things!

Good luck with the trip.  It sounds fabulous.

Ellen