Tramping from 26th - North part of South Island

Hi! Tourist (male, 32y) , visiting NZ, planning to do some tramping after Christmas (from 26th, max 8 days). I have some experience and in good physical condition. I was thinking of doing Heapy Track, Abel Tasman Coastal Track, or Travers Sabine Circuit (if somebody is interested, and thinks this is possible). Let me know if somebody is interested, so we can discuss more details.