Thanks,

@iCake:

So the verb pair for "to wash" is "мыться/умыться" ?
if I write "сходил покупками" instead of "сходил за покупками" is it wrong? And why "сходил" and not just "ходил"?
what is wrong about "Я буду быстро возвращаться."? why you wrote "Я скоро вернусь". My version is unintelligible?

@Heterocera: If I am not mistaken "отпуск" is an organized tour. However, I do not know if "Путешествие"/"тур" means something so different.