Obviously it depends on the particular cave and camp site. In general, caves are dark and damp places. Camping there requires lights and something to keep you dry and warm. It can be quiet but it can also be loud if wind is blowing outside or the cave has water dripping; that is how stalactite is formed. There could also be animals visiting unexpectedly since they are looking for shelter; just like campers!
No humidity, constant cool temperature, serenity and calmness, and no crowds or lcrowd noises Camping in a cave is in many ways a lot more challenging than even the most dangerous places for sleeping outdoors.
