Try a search on "PariShuttle" on this site, and you will bring up my prior responses.

For 5 people, 2 cabs will likely be required....so that may not be a good option for you.

If you do the Parishuttle from CDG, be sure to follow their instructions to the T (I believe they ask you confirm your reservation before flight and then call them as directed upon arrival). I have had a pleasant experience using this service to get to CDG airport, but I have not tried using it from the airport.