"My husband and son talked me into it. They just had to try it. Normally, we rent a holiday home, but Casper is an only child and now that he is 6 years old he gets so bored if he has no one to play with.
On a camping site you can be pretty sure that there will be other children close by."
And Casper certainly doesn't seem to get bored on this holiday. He comes charging in to pick up something, stays for a couple of minutes and then he is off playing with a couple of boys his own age.
"It's like that all the time," says his mother. "When we're not on an outing or at the beach they play from dusk till dawn.
We've told him not to leave the camping site and that he must come back here at regular intervals, so that we know that he is all right, and that works fine.
When we leave this site and move on to the next one I am sure that he'll find new friends there too."
The freedom of packing up and moving on to other sites is one of the reasons why Peter Madsen did his best to persuade Lise to go camping.
"I sometimes get restless at the prospect of spending a fortnight in the same holiday home.
The freedom of camping is great. And it is very sociable.
It is much easier to make contact with other people and it is a good way to get to know your own country. Somehow you feel much closer to nature."
Lise Madsen had been worried that she might miss the comforts which she normally associates with being on holiday.
"It is only as primitive as you make it. The toilets and showers are not a problem.
Many camping sites have very good facilities, and this site even has a swimming pool and a launderette, well, anything you need.
And if the sun isn't shining, you can even use the sunbed."
As this is the Madsens' first camping holiday, and thus more or less counts as a test holiday, they have not yet invested all their savings in a tent and the necessary equipment.
"We stay in a cabin. That way we can get a feel of life on a camping site, and we will be better prepared should we resign ourselves to camping life."
An increasing number of camping sites offer cabins where the visitors have a proper roof above their heads and will not have to worry about pegs and guy ropes. In short - they can enjoy the pleasures of life on a camping site without a tent.
However, the Madsens are considering buying their own tent next year.
"A tent is so much more different than our own house and a holiday should be different to normal everyday life," says Peter.
"The feeling of staying in a tent is much more intense," adds Lise. "I think I'm going to like the thought that there is only the canvas between me and the sky.
There is something very appealing about tents, especially at night when people sit outside or under their awnings relaxing under the glow of their hurricane lanterns, while the children fall asleep in their sleeping bags listening to the hush of their parents' voices."