Just a little tip, but best thing I ever did (at least related to riding with my kids) was to install helmet mounted intercoms. I use the Sena model 20s, but almost any quality wireless intercom system will work. They work up to 1km away (line of sight), and you never have to speak above a regular speaking voice (quiet Alta or loud gas bike/ATV). It definitely saved my voice from all the yelling, and I no longer had to flag my boys down to give them directions or tips. Just tell them in a quiet voice to shift, look out for oncoming traffic, take a particular fork in the trail, head back to the truck, etc. Definitely contributed to peace of mind as well, as I could lead from the back of the pack, and keep an eye on them, but still give them directions. Definitely my best investment in riding with the family. These things can also be expanded to other networks, so when riding as a group, you can connect up to 16 riders. It also hooks up to my phone with voice commands. So I can take calls, get navigation, play music, etc. Although I usually only use them to talk to my kids.