Leaving my 2 cats for 12 days ?

We are going to tuscany for 12 days and I was wondering if my plan for the cats is good. I'm leaving a big bowl of food/water. And my stepbrother is coming by everyday to feed/clean litterbox. He'll probably just stay to do that. So there won't be a lot of affection and they are very affectionate. But at least they see someone everyday. They have lots of space and toys. They'll be okay right? Any other suggestions/tips?