Thank you for your question.
I can give you a partial answer. A significant number of travellers returned to the country between March and May 2020. When people were being repatriated from various places around the world, things were changing rapidly, and we were trying to keep up. We already had bilingual border officers we could send to border crossings at the four airports, so we reassigned people as needed.
The quarantine information we provide to people comes from the Public Health Agency of Canada, which puts together the information handouts and documentation. The Public Health Agency of Canada runs the quarantine program in hotels, so I can't comment on what goes on in hotels.