I have the same set up, a 2 wheel mover on a twin axle caravan. Have you got a twin wheel mover or a single axle mover. Powrtouch does single a twin (same a single but electronics is different) and a 4 wheel drive
We kept the single mover from our old caravan but bought the twin electrics. It takes longer to turn but you can help, firstly if on the front axle lower the hitch to transfer a little weight from the rear to help the turn, if on the rear raise the hitch.
Most of our moving is rearward so we are having the mover relocated to the rear axle, dragging the front wheels around should be better than trying to push the rear around.
Shunting the van back and forward helps as well.
I wouldn't pay the extra for the 4 wheel mover