Thanks again for the info. Definitely wasn't planning on lying, just brought it up because it seemed like the system was too easy.
Also for anyone else reading along, for higher value items (musical instruments, higher end electronics), you can fill out something called a Y38 form "DOCUMENTATION OF GOODS FOR TEMPORARY EXPORTATION". Basically right before you cross the boarder, go into the Canada customs office and you can fill this out for those items. You can put a serial number for the item and they sign off on it.
More info can be found here: http://www.cbsa.gc.ca/publications/dm-md/d2/d2-6-5-eng.pdf