If you’re planning to spend more than a day in the Badlands National Park you should definitely consider choosing lodging in the park or near the east entrance. All of the marked trails, the main visitor center, and the lodge are on this end of the park. Options are limited for those who would prefer a very nice hotel. But certainly there are enough clean and cool options available. Cities to be considered would be Interior, Cactus Flat, Philip, and even Kadoka although it is a bit farther. Wall is another possibility which might have more lodging options.
Campgrounds are plentiful. The campground in the park is truly a scenic place to stay which can not be said for many of the roadside campgrounds in or near Interior. However, they don’t have a swimming pool or showers which you might really appreciate on a blistering hot day.
Another thing to considering is where you are going to eat. It is not very easy to find a good meal in the Badlands. Interior has almost no resturants. The Lodge in the park is one option, although from our dining experience there, I couldn’t recommend it. If you don’t want to pack a cooler and eat sandwiches then you might consider staying in Wall or another nearby town like Kadoka where there might be at least a few options.