Beautiful, peaceful, and secluded campground!
Bring bug spray and download offline Google maps before you go!. There is no cell reception at the campground and it is patchy in the Upper Penninsula in general. Beware of the black flies, which were unbearable for one day only during our trip during the 4th of July weekend. We have camped at many lakeside campgrounds in the Lower Penninsula many times over the years and have had some experiences with black flies, but this was on another level! Mosquitos were also bad, but at least they responded to bug spray (the flies did not!).
Site 15's driveway is very sandy, but we were able to back our front wheel drive car in just enough to not be handing in the campground's road.
Site 15 is also right across the road from the bathroom. We booked this site last minute and I'm not sure I would stay in it again since the door slamming noise any time someone went in or out and periodic smell was not pleasant.
Lastly, site 15's highlight is definitely its beach access! There is a steep but short sand climb right to the beach, and the water is visible from the campsite.
Overall, we had a wonderful experience at Twelvemile Beach campground and I'm sure we will be back some day!