I'll be arriving at CDG Airport at 7 in the evening and am planning to take the train the next day around 11 AM from Paris Gare est to Strasbourg. I really do not want to take a taxi to the train station since they cost about EUR 50 - 60. I have seen online that there are trains from CDG to the railway station. Can somebody please tell me how do I get to the train station from the airport? Are there direct trains or will I have to walk a little?
And what are the best options to spend the night in Paris without really blowing up much money.

