Back in 1987 I was going into Canada for a dog trial where we used shotguns to shoot pheasants and have our dogs flush and retrieve the birds.
As I entered Canada I was asked if I had any guns. I declared my shotgun.
I was then asked if they could search my pickup camper which I agreed to let them do.
In a drawer of my camper they found an empty revolver holster that I had forgot to leave home.
Needless to say they completely searched the truck and camper looking for the revolver that went with the holster.
There was no revolver as I knew you could not take a revolver or handgun into Canada.
I was also fortunate that I did not have any handgun ammo in the camper.
Unless things have changed since 1987 which I doubt I can attest handguns are not allowed in Canada by ordinary people.