Is Roberts or Polynesian Adventures willing to transport wedding guests?
There is also Speedi Shuttle.
They have a fleet of nice 12 passenger Mercedes Benz Vans
and Kauai North Shore Limousine and Tours Kauai North Shore Limousine and Tours have 14 passenger Vans,
SUV and Limo
Transportation can be costly but it's a huge relief for everyone
Your WC can book them for you