Territory....using the same grass?

My boyfriend has a pair of female rabbits and they have a huge bit of land which is cornered off that they play on, i have a pair of bonded males that are nutured and want to bring them to his to go on the grass, as mine have a run but nowhere as near as nice or big as his bit of land. Is it ok to bring my buns when his are in the hutch backing up onto the land or becuase of territory would it upset his rabbits?

Potentially both pairs could struggle with referred aggression through smelling the other pair.

Yeah before we had them bith near each toher, and they didn't seem to happy about it - they ignored them but occasionally stomped, so i guess its best to keep them to their own runs and grass! Thanks