The cold temps and no snow cover have the lawns absolutely hard as rock. Yesterday we used a 55t, it had to go in a tight spot, we looked things over and then backed the crane in, on the lawn, no mats, no issues. But the setup didn't look right, so it was decided to drive the crane back out, turn it around, drive it in forward and then do a 3 point turn to get where it needed to be. Did all that, with no trace of impact on the lawn. Ha! The idea of driving the 55 in and then back out and then back in, all without mats and no lawn damage is almost inconceivable, the thing is stupid heavy at 73k lbs.
Gotta love winter tree work.