Manson...check out thier site....relatively unknown, but has great potential for southern visitors to ask questions and plan a trip.
Spent a few days up there late last year with Darren from MAFSA. He put us onto fish and was kind enough to allow us to film the Hatchery and the fishing action for our new Big Barra DVD due to be released in a few months.
Darren is one of the good guys who gives a fair slice of his time to the stocking program up there. These are the best guys to get in contact with if you are visiting the dam for the first time. There a friendly bunch and will always give you the straight dope on the fishing!!
Randall.
Heres the website: http://www.mafsa.com/forum/default.asp