As it happens, this week, I just completed a stay at the Postcard Cabins Homochito MS (~2 hours from New Orleans). Here are my thoughts.
The cabin itself had the feel of a medium sized RV. In fact, the back of the cabin did have wheels, so it was towed in rather than built/assembled in place. It was permanently connected to plumbing, though, so unlike an RV, no concerns about how much water was being used. But that's how wide it is.
The cabin kitchen was well-equipped with a 2-burner stove, one large pot and one pan, plus plates, silverware, and cooking utensils (but oddly no spatula). There's a hotel-size half-size fridge, but there's no freezer and no ice available on site. The bathroom has a toilet and a nice shower (toiletries provided). There's no sink in the bathroom, you have to wash at the kitchen sink - and there's no mirror. There's a small table with 4 dining chairs. Our cabin had queen bunk beds; other cabins have just the single queen, which would make the forest-facing picture window even more expansive. The mattress was not luxurious but comfortable enough.
Outside the cabin is a fire pit, Adirondack chairs, and a picnic table. The cabins are well-spaced, and each one seemed to have the outside chairs etc on the left side, so while we could see the next cabin over through the trees, their cabin blocked the noise from when they were talking outside, and our cabin blocked our noise from the folks on the other side.
Unlike a typical campground, the marketing focus here is quiet isolation. They say that "all hours are quiet hours", with no outside music allowed, and request that fires be extinguished by 10 pm.
We lucked into unseasonably warm December weather, so I spent most of my awake time sitting outside, reading and conversing. If the weather hadn't allowed that, we probably would have started feeling claustrophobic. And there's no comfy chair to relax in inside, just the upright dining chairs and the bed.
These seem aimed at folks who want the camping experiences of being out on the woods, away from it all, sitting around a fire - but who want the creature comforts of a private flush toilet and shower, heat, and AC, and a decent bed - with no tent or camper setup required. It's not a place I'd stay at otherwise, even if it came up as a "nearby Marriott" for wherever I was traveling to. But we enjoyed ourselves. We had won a drawing that payed for the stay, but the paid rates seem to fluctuate between $90-$175 (holidays higher). For that price, we'll probably return for a nice affordable way to get away from the city for a couple of nights. Once it's in the Bonvoy system, it seems like it should be a reasonably priced point redemption.