Your local parents groups and others will post on here recommendations on what to bring. You can show up with nothing and be just fine. More socks, underwear, and compression shorts make life easier. Laundry happens like twice a week during PS. You can ship more. The PTR usually has a list of mandatory and recommended items. Old threads here have them also. A backpack with the cell phone, extra socks, underwear, compression shorts, paperwork, wallet, glasses and contacts is probably enough. Wear broken in running shoes, shorts, polo tucked in. Be comfortable. You leave Alumni Hall in uniform if they return to pre-COVID in processing. And no, they sweat all day. They get plenty of opportunities to shower and change; after PEP each morning, after sports period and before bed. You just get used to be sweaty and wet all day. It’s part of life… remember Bancroft didn’t have A/C until 15-ish years ago. USNA has done this for a long time… they will all be fine.