What are the laws on driving through Canada? Will I not be allowed to have my pistol with me -- even if it's locked up in a case?
Have you consulted the panda yet? It is a pretty comprehensive site with links.
If that's too much, maybe the NFA can help: http://www.nfa.ca/index.php
Or the RCMP: http://www.rcmp-grc.gc.ca/cfp-pcaf/index-eng.htm