Reserving a campsite at Killbear Provincial Park next summer

What I do for a different but equally as popular provincial park site is to go on the website the day before I want to book and see what is available or already taken for the period I want. In your case have a look on February 5 to see what sites may be booked for example from July 1 through 20 and won't be available to you from July 6 on because they are already occupied. Saves you a bit of scrambling on February 6 when you have already eliminated those occupied sites.