From : http://holidayinsights.com

“Ask each hiker or camper to bring a box or bag of their favorite cereal, nuts, pretzels, raisins, dried fruit, M&Ms, etc. For younger hikers or new members of the group, it’s best to provide them with a list of the types of food that can go into trail mix. That way, the inexperienced hiker won’t bring something that can not be easily carried. At the campout or before the hike, bring the group together and mix all the food in a big, big bowl. Put the mix into sealable baggies and pass them out to each hiker.

 Tips: When making your own trail mix, avoid messy items that leave your hands sticky.  Also avoid too many salty items. For example, unsalted nuts is better than salted ones.”