Nice tour brother your effort is really appreciated as far as you and your wife are concerned however it would be good if you keep the kids out of such adventures. Taking a kid on that long journey on bike is not appreciated at all, it was better to travel on car or bus (as advised by your friends).
Now people will read your travelogue of successful tour and blindly follow by taking their children to northern area which could be very dangerous. As evident on our roads most bikers are not careful riders and they dont bother to buy helmet and other safety equipment for themselves and kids. Majority bike riders dont use back view mirrors and indicators. They get the children seated on fuel tank and apply front brakes.
May be right now you would dislike my post as i am not praising you like others. At least there should be one guy who make you realise about the danger. Thank you.