Mat,
From Epcot, just use the back entrance. It's close to England and the bridge that you take to cross over to France. So if you're walking from England towards the bridge, just keep walking straight down. Just walk along the international walkway towards the Beach Club. About a 5 minute walk from Epcot exit. Once you get to the resort, just walk in and go to your left and walk all the way down the hallway until you can't anymore. Then go outside and walk to your right, should be right in that area.
As far as a time to go, it really depends on the season. The past couple years I haven't had any trouble getting in for either lunch or dinner. If you try the middle of the afternoon, that might be a good time since you just ice cream.