旅行に当った

I won a trip.

One day 

I received a latter.

The latter said that you won a trip.

However,It is only me.

One person.

It announced that other people participade in it if money is necessary.

Not cheap.

I decided that I went to trip only my family. 

旅行読売17年10月号「初めてでも大満足　あの名湯でひとり泊」 Amazon