The phrase "happy camper" is often used to describe someone who is content and satisfied with their current situation, particularly when outdoors or on a camping trip. However, there are many other synonyms and similar phrases that can be used to convey the same sentiment. These might include "pleased as punch," "over the moon," "in high spirits," "grinning from ear to ear," or simply "ecstatic." Each of these words and phrases can help to paint a vivid picture of someone who is truly enjoying their surroundings and feeling truly content with their lot in life, whatever that may be.