http://www.davistackle.co.uk/royalvgh.htm
I think a lot of people stay here when visiting the royalty.
http://www.avonangling.co.uk/page7.html. Regular updates of the conditions of the avon and stour.
If your there for a week don't spend all your time on the royalty, there's plenty of nicer ( and better ) places to fish, some on a day ticket and others on a guest ticket, although the royalty is probaly most productive for barbel.
I'm no expert, only been fishing it for the last 2 seasons, i think there are other people on here with more experience than me, so im sure they can be of more help.
Tim