Mark and Jennafer were lovely hosts. My boyfriend, my dog, and myself came to the Monument Valley area and picked Mustang Valley Campground based on it being a dog friendly campground.
Few things to keep in mind:
The campground is not within the tribal park itself but rather right outside the entrance. When you drive in there is a big parking area which serves as a dual purpose campground for those that don't want to stay at the three more primitive sites further down a dirt road. At the end of that road there are three canvas tents you can use which I would recommend since - you're camping in the middle of the desert and more protection from the wind/sand etc is nice. Originally we were going to use our own gear and setup right next to one of the canvas tents but we felt that might be a bit crowded and fortunately that canvas tent was available. Inside you have two cots, sleeping bags, blankets, pillows etc to use. Very convenient for those that want to borrow gear and go closer to the glamping side of things. All in all, we loved having a night off from having to pitch a tent!
I do agree with the other reviewers that some of the pictures are a bit out of date and if you're looking for total privacy this is likely not the spot for you. However if you're looking for a well kept campground next to the tribal park this one is a great option.
Things to do in the area: obviously go to monument valley. Get up for the sunrise, it's 100% worth it. Ask Mark if he's available to take you to his secret slot canyon (this will involve climbing so don't expect it to be a walk in the park). Drive north to check out Forrest Gump Point, Moki Dugway to Cedar Mesa, and Valley of the Gods. All doable from Mustang Valley.