I totally recommend the casita, we had a wonderful time there!
The location was easy to find and Abby and Keith showed us around as soon as we arrived. The hut is really cute and everything was spotless.
We were 4 and there is enough space in the casita for adding a 2-persons camping mattress on the floor. There is no electricity or running water but the gas-grill was perfect for cooking and Abby and Keith provided us with enough water. We also had a small camping cooker that was convenient for boiling water or making coffee, and some extra dishes, but you would be fine if you do not bring any.
It rained a lot that weekend (mid-April) but we managed to go hiking and even dipped in the pond by the cabin, and stayed warm thanks to the wood stove. Keith and Abby also helped us building a huge campfire at night.
We were also glad to find books and board games in the hut.