I need advice on the best thing to carry in the park to hold small items like sunglasses, chapstick, sunscreen, etc. I'm wondering does a pack work best or a purse/backpack (not a true backpack) work best. Also, anyone with teens ages 13 to 15, what works best for them and has anyone had a problem allowing their teens to go to the parks on their own? Thanks for the input and I'm off in in 2 weeks and 5 days...woohoo!