An open day for the River Don is to be held at Castle Forbes on 30th. May Further details can be read - here http://www.riverdon.org.uk/FileLibrary/PDF%20Reports/Don2010-final%20c.pdf
Looks like it might be interesting Iain, although to be honest I'm not sure it's a good idea timing these events smack in the middle of the fishing season. I never go to them simply because I'd rather be out fishing somewhere.
That said it could be a good family day out.
Was the Master of Forbes not a Doctor Who character? :D