My son's 4th birthday will be our first day at Disney. He usually doesn't use a stroller but I know this is a lot of walking. He's a little on the small side- about 35 lbs and right at 40" tall. Should I worry about renting a stroller or bringing the jogging stroller that's been stored in my garage collecting dust (it's big). Anyone have experience taking a 4-year-old and did you use a stroller?