Temporary (Pink) Registration

OK so I've had the Bonanza about a month now, and I'm absolutely in
love with the speed and comfort of this plane.

I really want to go up to Canada to visit some relatives, but I dont
yet have the permanent FAA registration, and the temporary registration
has a big "NOT VALID IF OPERATED OUTSIDE OF THE US" stamped on it.

Does anyone know if I can get a waiver or something to allow a trip
outside of the US? And, for that matter who really cares? I don't say
that to be smart, I mean is it US Customs? Canadian customs?
Transport Canada? If Canada doesnt mind, then by the time we come back
to the US we will be in the US so wont it all be moot?

Anyone dealt with this before?

Richard