Hi, jajsmom
I live in Matamata, AKA Hobbiton and thought that this may help you to see what is available. This is the official Hobbiton site and has links to arrange tours with other operators from both Auckland and Tauranga. Some cruise lines also run tours.
Tour Information
https://www.hobbitontours.com/en/experiences/hobbiton-movie-set-tour/
Transfers
https://www.hobbitontours.com/en/plan-visit/transfers/
Enjoy your visit 🙂