Here is the full list of all 6 Forest Camp Story achievements.
Proof of running a campsite for many years.
Proof of a campsite with a great view.
Proof of a splendid campsite that Kairobot is also satisfied with.
Proof of an attractive campsite where aliens come to visit.
Proof of a wonderful campsite where capybaras also come.
Proof of setting up a tent for the first time.