Okay...
Setup > Shipping Methods > Enter all Shipping Methods you are going to be using.
Setup > Shipping Costs Maintenance > Select Location and Method and Accept.
Enter pertinent information based upon Destination, which can be as granular as you like. For example you can use State, Zip, Road, etc. The freight calculation will compare Destination to address information until it can find a match. The logic also uses weight and volume for the calculations. Please note in our case volume is in GA (gallons) and you will likely want cubic feet.
I believe I had to add code to allow override of this auto-calc feature.