I would take the hoses and duckbill off. Store the hoses so that there is no hard bends in a cool and dry place. If the hoses are vintage rubber, also try to keep them in a dark container.
The same thing for the duckbill if it is not silicone. Some divers used to keep the old duckbills in the refrigerator or in a plastic bag with talcum powder. With new silicone duckbills is not as critical.
Also store the regulator in a cool and dry place. Put it in a container to try to keep dust and insects from getting into it. Make sure the dust cap is in place.
Before you go to use it, open the can and make sure it is clean inside the can. After inspecting it, put it on a tank and test the IP and check for leaks. Check how it is performing.
You can check for leaks by pressurizing the regulator and closing the tank valve. Let it sit for a while. When you come back you can check if the pressure have drop by opening the valve and seen if the pressure change. This assumes you had a pressure gauge in the kit, either attached to the regulator or on a banjo fitting.
In the regulator section there is a check list on how to check regulator. Most of it applies to DH regulators as well as single hose regulators.
