I learned a hard lesson by leaving so many extra sets of towels (and other supplies).
A guest (2 adults) booked a 2-night stay...and used more towels than you could imagine but the shocking discovery was that they took 24 rolls of toilet paper, 16 rolls of kitchen paper towels, my spare large bottle of liquid dish soap, a brand new bottle of laundry detergent...and they emptied the contents from by countertop built-in dispenser that I had just refilled with lemon scented handsoap.
I now leave only the minimum, and no longer accept 2-night bookings.
Fool me once... 😉