We plan to go to macau from guang zhou. How long would the customs immigration take at the border between guang zhou and macau? Will there be a lot of people traveling from guang zhou to macau on March 27-29 or April 9-11? Is it easy to pass through the border of guang zhou and macau? Will there be lots of walking at the border? What kind or how big should the luggage? Is it convenient to bring big luggage at crossing the border?

Thank you.