My husband, 3 kids ages 16, 19 and 22 and myself will be driving to St. Louis the evening of July 8th after touring the Springfield area. As soon as we get to St. Louis I thought we'd drive straight to the Gateway Arch Riverfront for some pictures and maybe go up the arch. Is there free evening parking near the arch? P.M. at the Hampton Inn near Forest Park. I'm wondering how best to allott our time (9, or earlier, to 2:30, in Forest Park the next day. Should we get there before 9 am when the zoo opens for some photo ops (where are the best ones?). If we arrive right when the zoo opens at 9 are there exhibits we should skip because the animals probably won't be visible? We're planning on parking at the free lot at the art museum and going in the closest zoo entrance. What are the must-sees and any suggestions on exhibit order at the zoo and minimum amount of time we should spend there? The St. Louis Art Museum and the Missouri History Museum also sound interesting. What would my kids like best or could we quickly go through each museum in about an hour? How much of a walk is it from the zoo to each museum? Or should we drive to the history museum from the art museum, hoping there's still an empty parking stall available? I'm assuming the St. Louis Science Center is for younger kids and we could probably skip that. Also, any suggestions for a quick and reasonably priced lunch in Forest Park based on our time constraints? We need to be at the nearby Cathedral of St. Louis at 2:45 for a tour and will leave for our 6 pm flight home to SLC after that. Thanks for any suggestions.