Please find our recommend itinerary for your family trip to Vietnam & Cambodia as follow:

http://www.discoveryindochina.com/tour/13-days-north-central-vietnam-angkor-wat

http://www.discoveryindochina.com/tour/14-days-experience-vietnam-cambodia

http://www.discoveryindochina.com/tour/13-days-angkor-wat-mekong-delta-and-vietnam-beach