Hi there.
Unfortunatly, we were unsuccessful in all our choices,- both dates and holiday parks. However, we were, as you say able to go online, and hunt around for what was still available. It took a little time, as we had to find a completly different date, and park, but eventually settled on one in north wales for three nights in December.
Really pleased we got something after all! Looking forward to it now. Do you know how often the Sun run the holidays? I've noticed that you can go abroad as well. I know it would be more expensive to do this. Have you ever done this, or do you tend to stay in the UK?
Not long till half term now. Hope you have a great holiday.