The current official restrictions are not only that residents of Ontario cannot cross into Quebec for non-essential reasons, they also cannot *be* in Quebec and there's technically a 14-day quarantine for travel. Knowing Quebec, I'd say any change in restrictions will happen after Ontario drops its travel ban from Quebec first. In practice, crossing into Quebec and driving in an Ontario car is fine if you're visiting Gatineau or Montreal. Anywhere else, especially in the Laurentides like Mont Tremblant, and you'll stick out like a sore thumb with a decent chance of being stopped by the SQ. So you'll have to wait closer to June 16 to know. My opinion is that travel will either restart then or on July 1 when many other provinces in Canada begin reopening provincial borders again.