Translation of crotchet in Spanish

Food was excellent, but unfortunately my wife could not eat it as it came with too much curry and she is sensitive to it. We were very tired and returned to the hotel around eleven o'clock.
I understand that you use the article 'die' when talking about a feminine object, das when the subject is neutral, and der when talking about a masculine object. But how can you remember all these?
As my wife is a travel agent, and knows that in certain cases people do not show up, we decided to take a taxi to the airport nonetheless. It was actually not far from the border, about 5 kilometers away.