Some excellent tips - I'm like you were having a fridge is always handy - as well as keeping crisp bread (it doesn't go moldy - my fav is Ryvita) - for making low carb breakfast to take outside to nibble on.
I find too when I'm holidays - I'm way more active then I am at home - so often those no-no foods I wouldn't touch at home - get eaten - because I'll be able to burn them off. Next month I go to Spain - so I'll be enjoying all the different cuisine that I don't get here in North America (I'm not a fussy eater - love to try new things).
One little tip - if any of you are on a low carb diet - for the plane ride - bringing abit of cubed cheese and some crackers can suffice for keeping your tummy satisfed. Due to liquid regulations now, buy a bottle of water once you get past security, and fill up from fountain when you need to or if you have a metal flask for water - pack it in your carry on - EMPTY - and refill on other side.
Not sure where you live Frances (will check your profile page after I post this) - seeing as you say you ate Cuban - you're either Canadian or European since Americans can't go to Cuba - but if you are insulin dependent - we are allowed to bring juice boxes in our med bags - incase of going low. I've only had them confiscated when I am returing from USA - they don't allow it - but Canada side does if you have a medical condition like ours. Check tho' first - as rules are constantly changing!