Wet baby wipes can be brought onto the airplane and through airport security and do not fall under the liquids guideline.
So you can bring a sealed bag or container of baby wipes in your carry on luggage to use for cleaning yourself or for changing diapers or cleaning your baby or child up.
I've brought the packages of baby wipes onto the airplane before and just brought a package of the baby wipes in my carry on luggage.
I always keep a pack of baby wipes in my purse as well because I use them a lot to wipe my hands and face with.