I have a 14 and 16 year old, but do not live in a rural area. I would not want a minor to have permission to access or use a firearm except in self defense, if one of the parents was not home. We have kids, including mine, who have driven to the range to shoot Trap league and Rimfire. I wandered 300+ acres with my .22rf as a teen, including where SW Plaza now sits, but I would not let my kids do the same thing now. Both of my kids are far safer and more proficient with firearms than I was in my early teens, just because of the number of times they have shot and competed in matches.

A weapons charge would be a mess. I don't trust other people to not try to hang something on my Kids, or yours, when they did nothing wrong. The risk is just too high for a teen to be out of the house, even on private property, without an adult present.