Hello; I don't know how much help this will be with your problem but, one thing I have noticed with tail draggers is that the tail wheel might get mis-aligned with the rudder so that everything is going along fine until the tail wheel lifts, then the pilot has to make a rudder correction to keep the plane going straight down the runway. If the pilot manages to take off, the plane fliesw great in the air but as it comes in to land it might lurch as the tail wheel touches down.

I have a float plane that has one float that floats lower in the water then the other, it's a quarter scale Spacewalker. It always needs a little left rudder to balance out and go straight, but once in the air the rudder is neutral. Other experienced pilots have flown it and had trouble with this peculiarity, but when I explain the problem most pilots compensate for it and have no trouble, but I have found that some otherwise excellent pilots just can't get this plane off the water.

My experience flying off snow (white water) has been that it's hard to turn unless your planing.