For a 2-3 day trip i don’t need many clothes. 3 sets of underwear, socks, and work polos don’t take much space and easily pack around my laptop and hand tools. I’ll usually re-wear my slacks.

Any longer and I’ll pack more into a carryon, especially on plant visits where I need steel toed shoes and PPE, but usually use the hotel laundry to cut down on total bulk.