How big are the cedar trees?  If they are less than 6" in diameter a big skid steer with a tree puller will take them out fast and do very little damage to the ground.  I've beem amazed at how much better of a job of clearing brush and small trees the skid steer does with a puller than a dozer can do, also the puller will get 90% of the roots pulled out with the tree so there isn't much cleanup afterwards.