Theres a little lake over the hill from the dam called Stanley that a friend told me has 15" brookys in it. We tried to get there one winter but got lost and walked around for 5 hrs till we ended up back at the dam.
There is a Stanley Reservoir a couple of miles to the NorthEast of Rampart on the topo map. Maybe that is what you friend was talking about. It drains into the same watershed as Rampart, so it's probably off limits too.