A monster like this doesn't fit in to the small pacific islands, Moorea, Raiatea, and not allowed in Bora Bora, which is a must see, just imagine when visiting a small island, what comes off this ship is just not right..
The river cruise ships are right next to the cruise terminal and from there it's 10 minutes to the centraal station, so basically what you did but in reverse, with a lot of luggage you can take a cab.