To prevent any problems, or any c4c getting in trouble, they must wear their uniform at all times, they can change into their PC at the hotel or their sponsor's home. As for swimming, yes they can swim, they just need to change back into their PC when they are done.
Making sure an upperclassman doesn't see you in civies, is not a smart idea from the beginning. First of all, everybody takes photos and posts them everywhere. You don't want to wind up with a photo of you in civies eating at a restaurant. Just follow your orders that you were given, and if you are outside the hotel or your sponsor's home, uniform on.
I've known a c4c that went to Denver with their family, and a picture of them showed up on social media not being in uniform. They got in big trouble, especially because it shows deception, & that they were trying to hide it and think they could get away with it in another city.
Just play it safe & truthful, and follow what you were told by your superiors.
****Most of all****
relax and enjoy this time with your family being together.
Don't think of wearing your uniform out as a bad thing, think of it along the lines that you GET THE HONOR to wear it out, and wear it PROUD, as you represent the United States Air Force.
Be proud and strong in it.
I've taken my Dooleys with me grocery shopping, and I can't tell you the number of times someone came up to them and shook their hands and thanked them for becoming a part of the military.
You have become a member/student at one of the hardest institutions to get into, one of the Military Academies. Be proud of it.
I sincerily hope you and your family have a wonderful, relaxing, and enjoyable visit this week.