The 52-strong Omanu team competing at the championships will be holding their clubmate's memory close when they compete, while the Omanu club itself is hosting a memorial service after Monday's funeral.
"We've told the family we'd like to help in any way we can," Omanu chairman Donal Boyle said.
"The Mundys have done a huge amount for our club and our wider movement and a lot of people in the wider community have also been touched by Harrison."
A number of fundraising events were held to help Allan and Hayley Mundy while they sought treatment for Harrison at Starship Hospital.
Nearly 700 people turned up for a dawn race to the summit of Mauao in December, while later in the month, Omanu club members Kirsten Wilton, Ross Parker, and Brent Bourgeois paddled 350km down the Waikato River to raise funds.