Juniper,
It sounds like your solution of moving to be near family is a way of dealing with a lifestyle that isn't working for your family right now. Where you live and your husband's job are things that can be changed. Is it possible your husband could look for another job that would allow him to be in one place long term? Could that place be somewhere you are more comfortable living? or somewhere near your parents and grandparents? And if not now, could it be a goal your family could work towards?
And about kids going with dad when he goes back to work, what about them not being with you and their siblings?