We are spending four days in early April right outside the Smokies' entrance (Sevierville) and plan to do several hikes. Kids are 9 and 11. We'll do easy to moderately strenuous with no hike being longer than 6-8 hours. I'm wondering if anyone has advice on gear, especially footwear. Are sneakers ok, or should we spring for hiking boots? Also, any other guidance (such as good hikes, etc) would be appreciated!