1 Night in Paris before departing CDG - Train arrival to Paris

Direct trains from Basel (no changes) go to Paris Lyon in about 3 hrs. Other choice is to go via Strasbourg (change trains there, total time about 3 hrs 45 min.) then to Paris Est. Lyon is probably the preferred arrival station. It can be more trouble getting to a CDG hotel and then to the airport than just getting a hotel in Paris. Get one near an 'RER B' stop so you can have a straight shot to the airport in the morning. There are quite a few good hotels near the St Michel and Luxembourg stops.

Unless your flight leaves CDG super early in the morning, spend the night in Paris. Even a few evening hours in the City of Lights can be wonderful! Assuming you're flying home from CDG, you need to be at the airport a full three hours before your flight's scheduled departure time. That means leaving central Paris at least four hours in advance. If you take the RER B to CDG, be aware that the line divides northeast of Paris. Be sure to get on a train that is going to the airport. For a zoomable map of the Metro & RER system, go here: http://tinyurl.com/6xmvms4.

Consider arriving at gare de Lyon (which I think is the most logical from Switzerland), staying in one of the many hotels nearby (we liked Hotel Corail a few blocks up rue de Lyon), and using Air France's "Les Cars" shuttle, http://www.lescarsairfrance.com/en.html, to get to CDG in ample time for your flight. Costs more than RER but more convenient, especially with luggage, and goes right from the station. With your evening you can walk up rue de Lyon to the Bastille and Marais, maybe the Ile St-Louis, or whatever whatever. If your flight leaves early AM, maybe better to sleep at the airport, but the station and shuttle info above would still make sense, I think.