It would certainly be a trek THEY'D never forget!
He's going to be a very quiet character. Only speaking when something important needs to be said. He's going to let the crew leader, a Scout, make all the decisions that the crew leader is supposed to make... and make lots of mistakes in the process. Often adult advisors become overbearing and don't let the kids learn to lead. It's very sad to see. And often they're in poor physical condition so their tempers are very short. This trip, with all of is physical and emotional trials, is nothing compared to what the ranger character went through in the special forces. I think he'll bring an interesting perspective to the story.