You should always be honest and forthcoming with border authorities, and misleading immigration officials can lead to serious consequences such as being banned from crossing the Canadian border for several years.
Pete Jerry Luna.
When possible, it is also advisable to apply for a TRP before your intended date of travel so that you know in advance whether or not you will likely be permitted entry.
Remember, if you show up at the Canada-USA border with a conviction that is more than ten years old but is considered celebrity stocking sex photos serious offense in Canada, you may still be refused entry since you will not automatically be deemed rehabilitated!
For Americans traveling to Canada, the most common reason for refusal of entry is the existence of a prior criminal record, specifically drunk driving.
It does not matter if a person is traveling with a tour group to see Niagara Falls from the Canadian side, to a wedding in Toronto with their husband or wife, or even if they are short sexy nude solo to go fishing or hunting in Canada's backcountry wilderness.
Some also believe that you can enter into Canada with a D.