Carp and I get out there several times a year. May not be a fast shoot at times, but we go for the whole day and wait it out. Figure if we're going to drive that far, we might as well stick it out. Sometimes it works, sometimes it doesn't. Best part is that you'll not have a crowd, and we would rather have a bird or two that works well and decoys than shoot a bunch at birds that won't commit to within 20 yards.
If you go, be prepared to move. Unlike the northern WMA's you should be able to find another spot, and if the birds are moving you have to go to them.