Hi,
The Dominican Republic is part of the North American Numbering Plan which means that you won’t have to dial 011 to connect to Canada when dialing from this country. So, you will dial: 1 416… to connect. I think the collect call will work when dialed from the Dominican Rep., but you might want to call and ask them before you leave – maybe they can give you a regular charge number you can call in case the Collect Call number doesn’t work.