I usually don't change my shorts if they're denim, but I would change everything else.
One tip. . . one time I put something on in the morning that I really wanted to wear that evening for some reason. (I can't remember why it was so important at the time, but it was.) While I was swimming and taking a shower in the middle of the day, I put the clothes I had been wearing on the air conditioner. They were fine by the time I put them back on. If you get to a point where you're just one outfit short and you'll have to wash clothes, you may want to try that.