Translation of archipiélago

Let us speak in the beginning of next week and arrange the exact schedule. I should get the first answer tomorrow or on Thursday evening. And by the way: Happy Birthday to your little cute daughter.
I walked down the main street of the town and soon found out that there was a nice place not far from the main square. It cost around two hundred pesos which was equivalent to twenty US Dollars.
We spent the entire day doing nothing, just waiting for the night train which would take us into the northern mountain area of Vietnam, close to the Chinese border. The train left at around ten.