From what I remember seeing - to use an electric hook-up, you need a special hook-up cable - presumably quite heavy duty and outdoors/water proof. So if you intend to use a hook-up you'll need to buy one of those first - you can't just plug in a standard home extension lead or similar.
Correct.
Awning/Tent Mains Kit - 3 Outlet from Towsure
I ruddy LOVE camping