What's amazing is that instead of scoffing clover all day, Elisa appears to be "managing" mealtimes taking them in there for a while and then moving them back out again. When they've had their fill of clover they always go back to chew in the main field (or in their shed if it's pouring with rain) so that seems to be where they feel safe.
Peter opened up a new gate for them so they don't have to walk through the stream on the far side of the field. He also put up a road block to stop them venturing into the arable fields (where R is harvesting). But otherwise they are free to wander... they always stick together though. We close the gates at night though and, in the morning, as soon as they see Peter they bleat like crazy until he opens the gate.