Do they have cabin rental and how big are they

There are 2 mini-cabins, each 10'x10' and each sleep 4 people (two sets of over-under twin-sized bunks. There's a microwave, mini-fridge, and coffee maker, and they are located a very short distance to the campground restroom-showers. There is no bedding for the matresses so bring your own pillow, blanket or sleeping bag. Outside is a picnic table and fire ring.

What Adam said and they are $52 per night. They can be reserved 1 year ahead of time!

Yes they do sleep up to 6 people and are around 55.00 a night.

Yes. Not very big from an outside view. I assume they sleep 4-6 people each. I believe there is 3 or 4 onsite cabins.