The best way to get on a trailer with a cross wind is to use Kentucky windage. Approach the trailer a little upwind and with a little momentum you pull it in and out of gear as you approach, If your line looks good, If the line is right put it back into gear and drive it on. If the line is bad, hit reverse and back away. You can get better control, in my opinion, by putting it in and out of gear then with the throttle.