Could you fence off part of your pasture at home? (permanent stob and mesh with a couple of top wires, not an electric fence) That way he'll still see the ewes so as not be on his own, but won't be able to annoy them while they are lambing.
Really the best option though is a wether. Maybe you could get one of a primitive breed which would need to be fattened over the winter anyway, and could stay with the tup until the summer when it would be ready for slaughter. Then he will have his own weaned sons to keep him company, but in a separate bit until you want him back with the ewes.
Our set up here, with primitives, is to wean the lambs at 4 months, and put them in with our stock tups (five of them). After the tups have done their job in Nov they go back in with the hoggs - this year we didn't have a single bust-up; they just got on with life as if the big boys had never been away. They are all safely out of the way during lambing, then the meat boys go off in August, a couple of weeks before the male lambs are weaned, and so we go round and round. Our tup bit is across the road and double fenced with hedges too, so no chance of escapees.