I'm a newbie with a 15 acre horse farm. Question- is it better for the tractor to drive to and from the manure pile and shavings pile, in high or low gear? Speed is not a big issue, but if I do want to go faster with a bucket load, which gear should I be in before pushing up the throttle? Also, when I go to pick up the shavings and/or manure, which gear/throttle should I use? THANKS!