The success of every marae encounter depends on how well each of the two communities meeting on the marae have prepared themselves beforehand.
No matter how experienced in the ways of marae encounters your community may be, you will come across to everyone in the community "on the other side of the marae" as inexperienced and unprepared if your community is unable to give them a vivid, enjoyable, and compelling account of who you all are, what you believe in, and why you have come to the encounter.
So pick your best speakers. Talk with them at length beforehand about what you want them to say about you as a community.
And be sure to decide ahead of time also how your community will show its support for your speakers at the time of the encounter.