Hi Bev & Tez, Welcome to caravanning. It's a great hobby which I'm sure you'll enjoy.
Regarding the site between B'ham and Worcester You could try Eckington Riverside caravan park. Its a nice site with electric hook ups and toilets and showers. these are a bit 'rustic' but its only about twelve quid a night to stay there. The site is on the river Avon about 3 miles from Pershore and though there are a lot of seasonal pitches there are some pitches for casual tourers as well. I'm Steve and my other half is Carole so if you find yourselves there any weekend come over and say hello,were 3rd van on l.h. side as you go in.