Hi, I am not a SW fishing expert as I live in Sussex but hope this helps
When on business in the west I try to combine a bit of pleasure into my trips and use the Angling 2000 scheme.
www.angling2000.org.uk
Can't praise it enough.
There is loads of fishing available for the price of a few pints, fantastic value and great fun. Some of it is real commando stuff. I have fished several beats now and always had success. You won't get big fish but on light tackle they really scrap. Mike Weaver has written a couple of published articles on the fishing available.
Damps