Personally I wouldn't go for a site with a slab, much prefer to have a nice grassy site (I have often thought golf courses are wasted on golfers! I can think of lots of better uses for them!) but as that is all that was available we had to make do, we haven't got the hang of booking the big holidays so far in advance!
In the UK you would have to be off your rocker to camp at Christmas and only the very brave go camping at Easter - we did it about three years in a row and frequently got frozen, blown about or soaked - if you were really lucky all three!
Amanda, our CT is a liberty 9, very basic just the trailer and tent - but is quick to put up, comfortable and after this weekend we found that it keeps the rain out!