Earl,
I have never fished Lake Moultrie and haven't seen a whole lot of posts on it here but I am attaching a link for the boat landings there.
It may be a good investment to hire a crappie guide for a 1/2 or full day the first day there to get a idea on best methods, depths, etc. It is a great place for big Crappie.
Watch the weather because it can get real rough really quickly on Moultrie due to relatively shallow depth.
Let us know what your results are.
https://www.google.com/search?q=lake...6!2i492!4f13.1