Hi!
Whilst diving on Coz--too many times to count because it is my favorite diving in North America--I have always used a yoke. In fact, the only DIN I have ever seen have been on the backs of a few Continental chaps: and they brought their own adapters.
So, if I understood your question, just bring your "normal", vanilla, no-bells-or-whistles reg and enjoy some of the best diving it will ever be your priviledge to experience.
And, between dive days, if you want a treat, go to Guido's Restaurant on the main street, far to the north. Absolutely wonderful food!
Scorpionfish