The Must-do List for Charleston, SC

My husband and I are traveling to Charleston for the first time ever, in March. I've been given some tips from friends and this is our to-do list (assuming we can squeeze it all in!). But I need your help, ListAppers - what else should we do?
  1. Dinner at Husk
    It's been on my list for a while. http://www.huskrestaurant.com
  2. Oysters at The Ordinary
  3. The Sunday Gospel Brunch at Hall's Chophouse
    Brunch? With gospel music? Heck yeah! https://hallschophouse.com
  4. Biscuits from Callie's Hot Little Biscuit
    Because: biscuits! http://calliesbiscuits.com
  5. A historical tour of some type
    Haven't figured this one out yet. Too busy planning all the FOOD. A plantation? Historic homes? Help! Walking would be great, especially given all the biscuits and grits I plan to eat.
  6. A visit to the Angel Oak!
    Suggested by   @amieshmamie