Honestly, I am not sure this is something that you and your boyfriend need to do together. I think the experience would be great for the boy, but maybe give him a little bit of time instead of right when he gets out. I also think he would need constant supervision and should not be in his own tent. That's why I think it might be better if your boyfriend took his brother on his own so he could sleep in the tent with him and focus all of his attention on his brother. Maybe you could meet them at the campsite and have a picnic with them, but the little brother needs to have someone in the tent with him and someone watching him at all times. That's just my opinion. I would also have several planned activities to keep him occupied so he won't have the time or desire to wander off. Fishing, toasting marshmallows, campfire stories, and hiking are all fun ways to keep the boy occupied on the camping trip. I hope he has a great time!