Ontario "snow birds" where their only Canadian residence is in a Seasonal Trailer Park, or Recreational Campground are permitted to continue their occupancy.
Recreational use of these properties are not permitted and subject to a provincial fine.
"We recognize Ontario "snowbirds" are returning to Canada earlier than they normally would. In some instances, seasonal trailer parks and campgrounds may have been opened earlier than usual to permit individuals to take up temporary accommodation in their mobile homes, recreational vehicles or trailers. For Ontarians whose only Canadian residence is at one of these seasonal trailer parks or campgrounds, they are permitted to continue their occupancy and complete their mandatory isolation order made by the federal government under the Quarantine Act which took effect on March 25, 2020."
Please see below for the full release from the Ministry of Municipal Affairs and Solicitor General.