Children can be very good at change. They can also get confused with differences. From early days they are aware that times with mum are different from times with dad, and that there are different rules or interpretations (which may be slight or may be significant).
Be open with your children about the changes that are taking place in their father’s routine. If children are given the facts and there is a clear reason explained to them, they are pretty good at adapting.
Look to ways that you can explain some of the benefits that the children will gain because you will be away, and then make sure you follow up and deliver the benefits that were promised.