Some of those ideas have been used here as well. Kids Give kids their own daypack or fanny pack and let them carry their own supplies. This gives them an important task and develops responsibility. Do not weigh their pack down too much. Remember that their bones are still pliable.
Heavy packs can hurt their backs.
Wear warm clothing. Take a jacket, even if you just carry it in a daypack. Plan for cooler weather than you might expect. I think that boots are way too expensive to buy for growing feet. Kids should wear comfortable running shoes.