First, we chose long or short. Do you want more time hiking or more time for program? Our crew decided that if they wanted to hike a hundred miles, they'd be going to the Sierras. Philmont offered program, so they chose a shorter trek.
Next, it was make a list of all the features of every trek from the shorter two categories, not just program but including showers and peaks, then have everybody vote for a few favorites. Then an adult sorted out which treks satisfied a lot of the favorites, then brought those back for another round of discussion and voting.
Mostly, our guys wanted anything that involved a peak or shooting. I was a bit mystified about the shooting, I don't really understand a several mile hike to shoot two rounds of black powder. There are easier ways to do that. But I wasn't voting.
We had a great time. Everybody had favorite activities, mostly different than what they voted for. My favorite was the trail camp at Wild Horse -- lovely spot, no program, just the mountains.