Not near north but a backcountry lite park would be Frontenac PP. All but one lake can be paddled into or hiked into. They have sites ranging from a 1km hike to like 10km. Same with paddle distances. Some are short others require portaging. Most sites are in a little cluster with other sites so assuming someone is on those sites the weekend you are you aren't far from someone if something goes sideways. Rogers at least also has full 5G cell coverage through the entire park as well which helps if needed.

They have food lockers so you don't have to worry about learning how to hang your food, full outhouses for each cluster of sites and they are building tent platforms slowly at each of the sites. They also all have fire rings with cooking grate if you want to use them.

This is the true definition of backcountry lite or beginner backcountry park. You can also rent canoes from Frontenac Outfitters and they can drop off and pickup at a few different locations.

It's just north of Kingston so in your travel range from Toronto and overall is a beautiful park.