We went to Withernsea Sands a couple of years ago, I think that was a platinum caravan. The resort was really nice, not as big and busy as the Haven I have been to (Mablethorpe). It's probably cheap because you're going in March, it will be alot more expensive in high season. Our caravan at Withernsea (just down the coast from Skipsea I think) was great, IMO newer looking than the Haven one so less worn and scruffy.
ive just booked to stay at a parks resort in skipsey sands in march. we will be staying in a platinum carivan and it was really cheap. now im worried its too good to be true!!!! has anyone any experience of park resorts. we usually go with Haven but cant afford their soaring prices.