Are any of the boats flexible with have extra people (kids) in the sleeping arrangements?
There are 2 numbers that regulate the number of people onboard. The number of guests for daily charters and the number of guests for overnight charters. We have seen some flexibility for kids under 12 months. Nevertheless, there are serious bureaucratic, legal and insurance limitations and the yacht managers definitely are on the safe side.
Usually, the issue is resolved by getting a boat with more sleeping space (similar boat with Pulman beds), getting a bigger boat, getting 2 boats or adjusting the number of guests.
Price ranges for yacht charters in selected locations

Cormorant II
Summer: GalapagosWinter: Galapagos
Infinity
Summer: GalapagosWinter: Galapagos
LAST CALL
Summer: AlaskaWinter: Mexico
PACIFIC YELLOWFIN
Summer: Pacific NW, Canada - West CoastWinter: Pacific NW, Canada - West Coast
Cormorant
Summer: GalapagosWinter: Galapagos
GALAPAGOS SEA STAR JOURNEY
Summer: South America, GalapagosWinter: South America, Galapagos
DOUCE FRANCE
Summer: W. Med -Naples/Sicily, Greece, W. Med -Riviera/Cors/Sard.Winter: Indian Ocean and SE Asia
OCEAN SPRAY
Summer: South America, Galapagos
Natural Paradise
Summer: GalapagosWinter: Galapagos
PRANA
Summer: Indian Ocean and SE AsiaWinter: Indian Ocean and SE Asia
Grand Majestic
Summer: GalapagosWinter: Galapagos
Blackwood
Summer: Alaska, Pacific NWWinter: Pacific NW
"To travel is to take a journey into yourself." Rainer Maria Rilke