Hi
@4mum_ Seems you've got most bases covered by information above.
Maybe one thing to consider is how you or any one in your party would manage to translate that you're a English speaking T1 diabetic having a hypo into Spanish.
Hopefully a situation that wouldn't arise, but a hypo is very similar to being extremely intoxicated. You could see how that scenario could develop especially if you're unable to translate your condition.
Hope you have a great holiday.