Have not been to either, will let you know when I try them my thoughts.
Farmgate Market = Saturday mornings at The Pier Marketplace. First day will be 18th April so very new, not even started lol. Not sure how many tourists are interested in produce when they want a holiday from cooking but if done well may showcase the remarkable diversity of the crops grown in the region. A real food bowl.
Herberton Historic Village - May be of interest to those touring the area as someways from Cairns. Bit of history to add to nature adventures.