The juveniles will probably be on thier own now. Try not to get too close to the nest,especially in the spring, they can tend to "attack" people that go to close. Well they swoop and screech at you.Leave them in peace on the nest and get them when they leave, they will loiter around certain areas. Alternatively, pick some dead rabbits or pheasants off the road, pick a good spot and leave the dead animals out for the buzzards, they are primarily scavengers and will soon find the bait,but if they see any sign of you then they are unlikely to land.
Hope that helps a little.