I find it surprising that nobody has selected a friend/friends, because sometimes these people are most honest, unbiased, incorruptible. I would put administration on a last place, because it is the most uninterested option in keeping what you value. A family is also a tricky selection. How many times we have heard how most close betray for their own benefit. And you know, trusting ourselves can play a bad joke to us. Nobody cancels emotions.
The one who should really be trusted a seed - a dog. Dogs never betray their owners.
Nah, I find it surprising how you can trust friends. You see your friends are honest, unbiased and incorruptible because you're not yet close with them. Just because you've with your friends for 10 years, you're already know them, nope.
If all the activities are about playing together, going out, study together etc, these aren't enough to reveal your friends characters.
You have to live with them for 3 months at least, hiking and creating a business together.
Live together in order to know their daily character, hiking/extreme sport in order to know what their decision in hard times, run a business because it's about money.