first off, lets go with the split. that split could well be within the core the whole length of the trunk. just because you cant see it, doesn't mean its not there. I would smash the trees under it and splash the road. whats the problem with that? risk your life to save a couple trees, """" that. it seems as though theres some large trees close enough to rig the whole tree down. throw some lines up and set 4 or 5 good rigging lines. climb the closest large trees and set blocks in the shape of a triangle with the tree to fall being the tip. strap the trunk. cut your notch chest height and butt tie the trunk to the stump. bore the center from the side and make a low back cut leaving a couple inches between it and the bore. get away from the tree. pull it over slowly until the vertical holding wood snaps leaving the hinge. slowly lower it. if this isn't possible, drop the tree would be my only option to the customer.