The Caper Cat is a very capable vessel for what you plan.
It was done 35 odd years ago as the marketing launch for the Caper Cats in Qld and featured in Australian Seacraft Magazine which morphed in to Cruising Helmsman. Back then they took 2 or 3 caper cats from the Gold Coast up to Hayman Island and called it the Hayman Caper.
They did have a support crew that travelled by road and met them at various points along the way. That was challenging because it was before GPS and handheld VHF and mobile phones as I recall.
You should contact Cruising Helmsman Magazine as they will most likely pay you a few bucks for an article.
Have a ball, stay safe and keep us posted.