gailkarp wrote:1. Is the pricing for the ticket from CDG to Bir-Hakeim (approx 8.4 Euros) for a one-way fare or roundtrip?
8,40€ is one way, good for both the RER and Metro parts of the trip.
gailkarp wrote:2. May I use a Visa Card to pay for the tickets?
According to the Paris Transit authority, CDG Airport credit card swipe machines do take foreign credit cards for payment. I myself have seen plenty of people having troubles with their non-European credit cards, so I would be hesitant to tell you: Yes, you can use your Visa card. Please, to be safe, retrieve some Euro cash from a bank machine at CDG Airport before you enter the lineup to purchase a RER billet Ile-de-France. These lineups can be long. And, regardless, Euro cash is always a good thing to have on hand when in France.
gailkarp wrote:3. What is the Four Letter Destination Code for the train to take me back to CDG? Is the name of the stop CDG or Charles DeGaulle Airport or does it have a different name?
Any RER B train leaving from Paris RER B stations (example: Gare du Nord, Denfert-Rochereau) with a Four Letter Desintation Code starting with the letter
E will stop at CDG Airport. For example:
EKLI.
The names of the two train stations at CDG airport will be Aéroport CDG 1 and Aéroport CDG 2 - TGV. The first station gives access to Terminal 1 and Terminal 3. The second station gives access to CDG Terminal 2. Aéroport CDG 2 - TGV will be the final stop along the RER B line. All passengers must descend from the train here, so you cannot miss this stop (unless you try really, really hard).
gailkarp wrote:4. Do you have a restaurant to recommend that is near the bir-Hakeim train station? If so, which direction would we go upon disembarking the train and what is the address of the restaurant. Are there any other conveniently located, notable sites to visit in that very brief period of time?
CityVox and
mmmm! are two sites that I use to check restaurant reviews here in Paris. They're in French, but you get the idea with the stars and smiley face ratings on the restaurants.
Best of luck,
Ben