Amend the rule, “Islands” by appending:

Once per day, a hunter may roll two five-sided dice by posting DICE5 DICE5 to the GNDT. The two dice values shall constitute the hunter’s “Location” where the first die value corresponds to the first word of the Island’s Code and the second die value the second word of the Island’s code. A hunter should update their Location in the GNDT after rolling.

Add a field for each hunter in the GNDT named “Location” as a dropdown containing all islands’ names, with a hunter’s value to be set after the hunter has rolled, per above.