I found that on my first experience with a trail dragger there is a speed at which the rear wheel doesn't really do anything, and the plane isn't going fast enough to control it with the rudder. I found that up elevator along with accellerating past that speed on take off and slowing down below that speed on landing really helped. Now I still fly on a frozen lake in the winter time so it has ice on it which only makes things worse. I try to have the plane completely stalled on touch down, because the first couple of feet on ice after landing I don't have a ton of control, but hey, it's on a lake so I have tons of room.

schu