I just got back from Grand Cayman and Testudo made some great points! We didn't head out to rum point, its more of a cruise ship stop, a couple of shacks that are bars and a beach. I would go to Kaibo and take a walk to the end of the road to see the deserted beach. Check out Sunshine Grill across from the Westin for some great Fish Tacos.

We did notice that the prices are steep there, more than I've paid in the past on an island (sxm is usually my home island). The prices for alcohol are good in the airport and we noticed that in Georgetown the only deals for the liquor was for the cruise ship customers.

Enjoy your trip!