As you will be wearing headlamps in your head which can be pretty uncomfortable at long periods, design, size and weight are to be considered. Generally headlamps are built with considerably small and weighing only a few ounces.
A quality headlamp should be comfortable, relatively lightweight and sturdy aside from being able to provide you a light source. The BioLite No Bounce HeadLamp gets a special mention on its ergonomic design which is an additional point when needed to be worn at long periods given that it is also the lightest, weighing 0.64 oz, among the others in the list. Heavy duty headlamps like the Elmchee Rechargeable Headlamp weighing 8 oz, packs a few more ounces as a takeoff to it being a very capable unit having different modes at 12,000 Lumens rating.
There is one unique headlamp in the list that made it because of its design, the Original DinoBryte LED Headlamp. The T-rex design will surely appeal to your kids and having them wear it during camping will not be a struggle. But do not be fooled, this model made it to the list not just about its design but it is perfect for camping as well. It boasts of 50 hours battery life at an average of 20’ beam distance, this model is a likely staple on family campings.