If you can't stay in a hotel in Macau, is there a place to store your belongings?

Of course, lockers in large supermarkets are free, and generally larger casinos also have free storage places. If you can't find it when you go, just ask the waiter and others will show you the way. Eat, drink, smoke and see which casino. Yes, keep it for a few days, because you should go through customs. It's better to stay in a hotel by yourself. If you sleep in someone else's yard, the security guard will disturb you and wake you up.