I would like to take the RER/metro from CDG airport to our hotel on Rue Cler, but I am not sure of the best route. Looking at the map, it seems like there are several possibilities:
RER B to Gare de Nord, line 4 to Strassbourg St. Denis, line 8 to Ecole Militaire.
RER B to Denfert Rochereau, line 6 to la Motte Picquet Grenelle, line 8 to Ecole Militaire.
RER B to St. Michel Notre Dame, RER C to Invalides, line 8 to Ecole Militaire.
And there probably are more routes that I am not seeing. Anyone know the best route? We will be taking the Eurostar from Gare du Nord when we leave Paris so I was thinking it might be helpful to go that route just to see what the station is like (we have been on the Paris metro before but never to that station), but it might not be worth it if the transfers are easier a different way.
Thanks!