Although the status for the North Rim is still in flux, they opened today, Tuesday June 30th, for Day Use only. Larry's right; check the website for accurate information.
Im not sure the planned status on the campgrounds for August, i was there June 11th and the campgrouds were closed. The North Rim is currently closed due to the Magnum Fire, best to check with the North Rims web site as far when the campgrounds would tentatively be open. The check out recreation.gov about possible reservations
Thanks! Your answer is awaiting moderation.