Hi Andy.
Last time we were there the east bank to the right of the dam wall was producing well, unfortunately we were 2 on the dam wall, and 2 on the north bank as anglers were dotted around on the east bank.
I'm no great carper, so my methods were straightforward.
You hire a boat, and row out a pole to fish to, chuck your bait in and row or cast your baited lines to the pole.
The lake is very silty, so you might want to consider pop ups at least on one rod. We fished with monster crab boilies over partiblend and hemp, but I don't think there is any particular bait better than another. Starmer will try to sell you his own bait which I expect is good, but not essential. There is a very good tackle shop in St Meen, although the guy in there speaks no English. French maggots are poo!
Be prepared for dogs barking all night, they are dotted around and seem to bark at each other over great distances. Also on sunday the locals normally hunt, and you can expect lots of shouting for a while and french men with shotguns.
Anything else you want to know just ask.
good luck
Grizzly