If you're going to be doing day trips and it's hot, take one of these http://www.friouk.com/
They are really good, just soak them and they keep your insulin cool, I used one camping in Portugal, fantastic!
If you are drinking, remember alcohol will make you go hypo a few hours after drinking. That's what it does for me anyway; have something to eat before you go to sleep if you've been drinking, and adjust your insulin the next day!
I've been caught out a few times, bit hungover, not really hungry, did usual insulin - result is a hypo.
Have a good time, I like Malaga, took my youngest daughter to the Picasso museum a few years back, she was only four but it was great! The marina at Benalmadena is lovely too!