M.R.
I think that you should relax and enjoy your trip!
Worry about this only if your child has a skin condition that is under a doctors care, and then follow the insturctions you already have, so that you can continue them while you are away. If it is working here, it will work there, but if this is just run of the mill toddler skin that is sensitive in the sense that all children are more sensitive than adults, don't get too worked up about it.
Your baby will be fine! Please stop worrying so much and enjoy your trip!
M.