You must walk across the street from the other garage to get to the hotel. Since there is no walkway to the hotel from the garage, you must walk across the parking lot adjacent to the garage to get into the hotel. The Excalibur parking garage is fairly small. You're almost better off parking in the uncovered lot, because it's closer to the hotel. However, if you want shade during the hot summer months, stick to the garage.
General parking is on levels three through seven.
The ground floor through second floor is for valet parking only. There is a Budget Car Rental drop-off in the garage. Parking can be validated for five free hours. Parking costs 75 cents per hour. If you get your ticket validated, you get three free hours.