I haven't rented a camper before, but I think, depending on season, getting a site and renting a camper does come out close to the price of a cabin. At that point it comes down to what you want out of your stay. Camping is fun and different, if you have never done it before. Campers are slightly different than a house or cabin though. Most things are down sized a little. Refrigerator, bathrooms, sinks. Toilets work a little different (foot pedal to flush). None of it is a big deal as long as you are aware of it going in.
Staying in a camper feels a little more like "camping", but a cabin or an RV will still put you at the Fort with all the fun there to enjoy.
If I was going to spend the same money, I'd probably go for a cabin. They look pretty neat and it would be something different for us.
j