My vote goes to these guys the Eastmans fleet, I've always done well with them.
Two years ago, I organized a Spring time cod/haddock private trip, I had the whole boat for 16 of us, friends and family. between my two kids and I we boated 76 haddock and I didn't bother to fish while the bite was hot, the joy of seeing the kids double up most of the time was good enough for me ;D
BTW, I'm going to book a 6 pack trip with them for mid May( just before the stripers and fluke arrive) cod & haddock at its best, I have 3 places left, so If some of you want to joint let me know soon.