It's not easy to find antonyms for the word "decampings" because it is an uncommon word with a specific meaning. Decampings refers to the act of leaving a place quickly or abruptly, often due to fear or a sense of urgency. So, antonyms for this word would be things like arriving, settling down, staying, or remaining. None of these words convey the same sense of sudden departure that decampings does, but they are the opposite of what the term represents. To use them in a sentence, you might say, "We arrived at the hotel without any decampings during our trip.