I go on all inclusive holidays and still stay on plan, here are my tips! (I managed a STS from a week in Turkey in April so it works!)
I took an EE approach to food so stock up on fruit and veggies where you can!
Avoid Bread at breakfast - instead have fruits, cereals (HEB!!!) and egg based foods
Drink loads of water and steer clear of creamy cocktails at night! Diet drinks are great too!
Meal times - try to have tomato sauces or fish meat that has been grilled.
I did 30 mins of exercise every day - swimming (proper - not bobbing round the pool!) walking, or visit the onsite gyms. I found it easy to do this after the sun had gone down, and before evening meals - that way you can shower after and get ready for the night!!!
Dance - make some body magic on the dancefloor - you are on holiday!!!
Have one treat every day - and pretend that is your syns!!! so i had perhaps one creamy cocktail, or a cake, or some icecream, crips etc - so you are having your treats - you are on holiday after all!
These are just ideas though - some people decide to have the holiday off plan, but I feel that you can still have a great holiday - but keep SW at the back of your mind....! xxxx
I am off to Cuba myself next month - cant wait!!! where are you staying? xxx