Another thing to keep in mind…if it is hot…everything in the South has air conditioning. You probably should bring something to wear when you are inside…like a sweater or jacket.
Capris are fine, and white is fine. Enjoy your trip!
Thanks to everyone 
@Sybylla not formal, but I like to wear something that makes me feel fresh and vibrant and respectible. I was just wondering if there was some sort of fashion faux-pas in the south about wearing white in spring. I don’t think of white as formal-may capri pants seem more picnic-like. If they get dirty, I can use a stain remover, so I guess I’m not too concerned about appearances of being dirty, just style and feeling good about what I am wearing.-ha 
@ultimom and @thumper1 I will definitely bring along a sweater/jacket as my upper body gets cold easily. I’ll probably bring along a “mom bag” as my d calls it…to keep jackets/sweaters in if it is too warm.
Definitely bring jackets and an umbrella. My D goes to school in Texas and is constantly adding and removing layers. And it rains a lot. Check the weather forecast in advance obviously in case things are unseasonably cold, but I think the items your mentioned sound great. Have fun!