Watch how the dozer work goes or you could end up with more dirt than tree. We hired a dozer to clear a new fence line (fence was not on actual surveyed property line by up to 50 feet on one end) that was 1/4 mile triangle with 50 feet at the long end to a point at the other end. The dozer pushed up some very large trees with large root ball and then shoved them out into the existing pasture about 60 feet. It had so much dirt, rock fence debris, that it wouldn't even burn. We waited about 2 years for it to dry, then tried to roll out the trees from the dirt but quickly decided that it was not feasible with our equipment. We then hired a new guy with a D6 to roll the piles out to clear out the dirt and fence debris. We then burned it and the same guy then spread the ashes and dirt out while separating out the fence wire and metal post. It was about 6 hours work total added to the 10 hours of clearing time. It was much cheaper than running a branch thru a radiator on the tractors or ruining a tire or two on the old wire and fence post. There really isn't any excavators for hire here in the area now that the one contractor sold his trackhoe.
With your own excavator, you can dig up the trees, cutting the root ball down to minimal and even knock off a lot of the dirt, stack them neatly also if you have a large excavator with a thumb thus minimizing the dirt content. You cant afford to take the time to do this when renting and surely don't want to pay $100 an hour for contractor to do it.