You might want to do a search here on the Festiva Charters - there are mixed reviews on them for sure.

Might be better/safer to try to find a group of friends to go with you and just find a boat with a captain and split the cost? Taking the chance of being on a boat for a week with people you don't know from a hole in the wall is a bit risky.

Blue Moon (a sponsor here) sometimes does this time of charter so you could check them out too - great boat, GREAT captain!