Most hotels expect departing guests to vacate rooms by 12:00 P.M. and arriving guests to check-in after 3:00 P.M. to allow for housekeeping services. If you arrive before the hotel's check-in time, inquire about leaving your bags with the front desk or bellman.
Please note, the hotels do have housekeeping, however, control over your stay is up to you, guests can tailor their housekeeping services to their comfort level by contacting the front desk.