Is it open to the public yet? Is there a campsite or an overnighter near the harbour ? as hubbie and daughters came to a match there when Wembly was being revamped and said it was a great area.
It opens tomorrow.
http://cardiffbaybeach.co.uk/
With all the things that Cardiff lays on, wide catering for motorhomes is not one of them.
There is a site in Bute Park, near Sophia Gardens, but I've read that it is expensive.
http://www.cardiffcaravanpark.co.uk/
A nice touch is that you can walk from the campsite to the waterbus stop and take a boat ride down the Taff River and the boat docks right by the Beach. From the campsite it is just 10 minutes walk to the city centre.
The boat stops at Mermaid Quay which is next to the beach.
http://www.mermaidquay.co.uk/
Much food is available at Mermaid Quay.