Can anyone tell me whether there are taxis that can transport 4 adults plus luggage from Charles deGaulle airport to Paris?
Yes there are taxis. Be very careful to only get an official cab. This will require waiting in the taxi queue. Avoid like the plague any random cabs offering rides. Official cabs are outside of gate 18 in terminal T1, not sure about T2. If you're bringing tons of luggage you may be forced into using two cabs but of course as Rick Steves' fans you are, I'm sure, traveling lite:)