Blimey if that is your only concern, don't worry; Unless you intend to run everything under the sun on your caravan.
You probably won't need the TV or the heating on, you may have to turn everything off if you have a hi powered domestic kettle or watch what you have on if someone is going to use a hair dryer. Just use a bit of common sense with what you have on, we frequent a campsite in Spain where it is only 5amps, we run the built in caravan fridge, a "Stella Artois" drinks fridge, a 3 way power travel fridge, electric fan, and at night 10m of rope light without any issue, and a daughter with hair straighteners. The only thing that ever pinged it was the use of a domestic 2000w kettle: which was asking for it really.
What I would suggest is that you invest in an adaptor that allows you to connect your blue 3 pin CEE mains cable to a European 2 pin socket, without the need for a re wire.