Where to stay in Blackpool

I think they have settled on booking a caravan on a small private site a few miles out of town

As far away as possible. LOL
On a more serious note, St Anne's is very nice and only a short bus ride away.

Thanks Chewbacca

I'd stay just outside of Blackpool myself and would suggest Thornton Cleveleys, which is at the North Shore end of Blackpool. It's an easy walk along the sea front into Blackpool itself. Alternatively, the trams run straight through Blackpool and into Thornton Cleveleys every few minutes and costs £1.80 for a single fair. If you have a look on TripAdvisor for recommended B&B.s., there are dozens to choose from.