We've done a couple of the sun £10 caravan stays (they aren't actually £10!) and the caravan has been just fine, I tend to not look too closely at everything, but on the surface it was clean enough, the mini gold nicely kept
We didn't go in the pool as don't have children, ate in the restaurant one night and the food was fine, probably in between Maccy Ds and weather spoons (the one round here does nice food!)
The other guests were fine, although didn't do too much hanging around them, just had dinner, the football was on so DH wanted to watch it so we stayed in the bar and no one did anything awful
It's actually quite cosy chilling in the caravan in the evening with some activities and board games, although who knows if I'd be saying that if I had little ones!
I think our Bournemouth one was Park Dene and the IoW either them or Haven
I'd make sure to do your research on trip advisor of any possibilities
We can't afford to go abroad this year so if we did do something and I'm not pregnant yet, I'd be open to considering doing another if we can afford to