What to bring at camp?

Ok.. its in a cabin with alot of other people im 12. We are going horse back riding, archery, crafts, swimming, and alot more! :) im going with my friend. oh and we are going to be taking night walks and everything. (we cant bring electronics,food,and more.) we only can bring 20 dollars for snacks,and they have a gift shop. I have no idea what to bring HELPP say as many things as you can. THANKS!! :)