Okay. We havea 14 year old nephew and we take him hunting often. If I were in your shoes with my nephew who lives only 3 blocks away, I'd run him by and have him get his gear. My nephew LOVES to hunt with us. His dad takes him too so he has lots of opportunity to hunt. He has forgotten gear before, and I know it has been because he has had other things he was more interested in doing at the time (girls the least of it all). The thing is, kids who hunt with family will be far less likely to get into trouble with their friends. They learn the "responsibility" on a far larger scale. Teach him the "responsibility" lesson in respect for ethical hunting, animals, and other people. Let his mom deal with the little stuff. You have a rule on your lease, make sure he understands it and hunts what he is allowed to hunt. I wouldn't let him get away with leaving his hunting gear behind everytime and I would make sure he understood that it is a pain to have to mess with it when he is old enough to get his stuff together. The experience he'll have with you is the important part though and the fun part. Just let it go and enjoy the hunt and the bonding. You really don't want to push him the wrong way and make him wish he didn't want to go with you to hunt at all. Oh, and I have kids (younger, but still). I will and do expect them to get there stuff together, but they are kids and will continue to learn that lesson over the course of their lives. Eventually, life will teach them the lesson in a very meaningful way.

Good luck.