Documentation:

From the EAA: "The US and Canada have agreed not to require US or
Canadian pilots to have a restricted radio-telephone license or an
Aircraft Radio Station License."

http://members.eaa.org/home/homebuil...0Aircraft.html

From AOPA: The AOPA/COPA Guide to Cross-Border Operations (United
States/Canada) - Arrival Requirements:

http://www.aopa.org/members/files/tr...ada/can02.html

Aircraft Documentation

Aircraft registration certificate (temporary "pink slip" registration
forms are not valid for international flights);
Aircraft airworthiness certificate (for aircraft with a C of A);
Aircraft operating limitations (including the "Standardized Validation
of a Special Airworthiness Certificate - Experimental, for the Purpose
of Operating a United States-Registered Amateur-Built Aircraft in
Canadian Airspace);
Weight and balance information;
FAA 337 form when the aircraft has been fitted with extra fuel tanks
in the baggage or passenger compartments.

Don