I have to put up 850 feet of fence in a couple days. My fear is that my tractor (that has no down pressure on the three pt hitch) is not going to drill. The weather has made the ground very hard around here. The job is about 45 mins away so i don't want to trial and error it. If i rent a skid steer w/ auger, or a dingo do you think that the down pressure they have will be enough, or do they not always work ether?