there is no difinitive answer mate. some hares prefer to lie up in the hedges or in woodland.
others in there forms in the centre of fields.
weather can play apart to, if you have fields that are uneaven or rise up slightly, the hare will often lie here getting out of the wind and weather.
but dont forget the woods, copses and rough set a side. one place i used to have the coursing rights on was like this . and i was for ever telling people i had invited to walk the rough. cos most of them just wanted to walk the centre field.
after they seen a few dozen get up in set a side