Has this wood been any place where insects could attach themselves to it?
But as Gordon says, check with CBSA.
& I'm sure you know CBSA is stretched further than the limit of present staffing levels can go -- given that there are so many seeking to move from the USA to Canada.
I think you might also check Ontario provincial regulations too. ON has limits on camping on crown land and it is a big province. It would not surprise me if there are provincial limits on how far you can travel and use wood.
:C