Translation of schiffbar

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
You may know that most young students fly South on spring break. You can imagine how the parties look like down there, and how many drugs are consumed during this vacation. I prefer the quietness.
I went to the desk of Aerolineas Mexicanas and postponed my flight by two days. I did not have to get prepared as I had done some homework before coming here. The backup plan was Isla Mujeres.