A camping event lasts several days and normally requires tents and fire pits. The term "camping event" can also be short-hand for any event that involves an overnight stay. Some of these truly involve camping, where you spend the night in your tent (hence camping) and cook your own food. Others involve more civilized accommodations, with cabins, beds, and food provided by the event staff.
These events can last from a weekend to a war that lasts a week or more. In many places in the SCA, the camping event is prevalent because of the long distance many SCAdians have to travel to get there. A day trip would not be possible. In some camping events, usually those that only last the weekend, formal event activities are only scheduled for Saturday, and the day before and after are left for travelling, camping, and socializing. In longer events, activites may be scheduled over several days.