holiday rates are great BUT...

that's usually the time for familly and they know you will bring the kids so what they do is.....

charge full price for 3rd & 4th in the same cabin. That's sometimes triple or 4x price of 3rd/4th price 'non holiday'

so do enjoy rates .... but if you are bringing the young'uns
...take 2 cabins. And pay the same as all together.