Hi

to clarify, alot of companies like the employee to come first for a month or so, not only to sort the formalities out - such as RP etc but they find it is less distracting to the employee than having to worry about the family as well as moving to a new country and starting a new job.

that being said, it all depends on how adaptable your family are to new situations and that is something only you can answer -some would prefer and 'advance party' so that everything is nice and settled and organised when they bring their children.