Great input from you all and thank you so much!
I do believe I'll make my own, being careful about the sugar ones. The idea of freezing the snack packs is great and I'll do that.
I'll use mainly nuts like almonds & walnuts and dried fruits such as cherries and cranberries with some raisins too.
Thank you again, I'm heading out to a bulk food store so I can choose these ingredients and get making my own, healthy Trail mix!