Does anyone know if there is a taxi stand near where the roisybus drops off at the opera?

hi europeannovice! [great name, but of course you may have to change it to "expert" at some point]

if you go to google maps, put in opera, paris, then search taxis.

there seem to be several in that area.

regards, ann

yes, you can assume there would be one near an opera house.

Right on the Place de l'Opéra.

Thanks all. How much should I expect the fair to run with 4 people and luggage to the louvre area which is down the avenue but too much for mother in law to walk with luggage? Would the taxi take 4 people or would we have to split up?

The alternative is of course car service from the airport.

If there are four of you traveling you are probably better off taking a taxi from CDG. There are plenty of minivan taxis available at CDG, and it will not cost much more than what you described. Plus you do not have to handle your bags twice.