No matter what you bring, or leave behind, you will have the most wonderful time. LCBR is incredible, the staff are most accommodating, the food excellent (if Anthony is still the chef). The dive op is well run and the DM and captains quite friendly. Prepare to be spoiled! Highlights of our trip in July were seahorses, lots of spotted eagles rays, and a reef shark. Couldn't recommend one dive site over another, they were all spectacular in their own way. Topside, make sure to borrow one of the bikes provided and just tool around. Going back this June, can't wait. Have fun!
The food is "excellent". Compared to what? I've stayed at three of the resorts on Little Cayman and LCBR has BY FAR the worst food. Mystery meats, soggy salads, overcooked, etc. Try a meal at Pirate's Point or Southern Cross while you are there and I'll bet you never return to LCBR.
It's probably too late to change resorts but maybe you can at least cancel the meal portion and bring your own food and eat at some of the other resorts. I'm not that picky about food but that junk they serve at LCBR really is awful!