According to our experience, the procedure to obtain a visa is much longer if it is done through a travel agency.

Persons lawfully admitted to the United States for permanent residence who are in possession of their alien registration card (Green card) or can provide other evidence of permanent residence do not require a visa to visit Canada.

Extract from the web site of  : Citizenship and Immigration Canada (November 2007)

You will find information on the procedure for obtaining a tourist visa on the website of the Canadian embassy of your country. You will find the embassy website address by selecting your country on the following page

Note: If you have been denied entry to USA, chances are Immigration Canada will also denied you a visa entry to Canada.

Once the camper is registered and the deposit paid we will send you by email (PDF format) an invitation letter to be presented to the Canadian embassy. If the visa is refused and the application for the visa was made well in advance we will return the total amount paid including the deposit. 

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