Found a 'relatively' good deal to stay at a really nice holiday park in Bude in mid August with a summer discount offer they have going on at the moment. I went there a couple of years back and felt that it was a cut above many of the holiday parks that they have in this region.
I think you can get the discount on a selection of dates so worth playing about with this but I used the following criteria to get £306 off of the original asking price of £705 bringing it down to a more manageable £399:
18th August for 4 night stay with 3 adults and 3 children.
I know this deal isn't going to be for everyone and please don't bother with the 'you can go abroad for that price' posts, there are numerous reasons why that isn't the best option for some families, but anyway I hope that it helps someone out and that the good weather holds out…