How to improve turning in my 6x4

I was hoping to use the gator to pull a small manure spreader down our vineyard rows.
I'm finding it won't turn cleanly...hops a bit and can pop me into a vine.
Slower is a bit better...we're talking 'real slow' however.
So...
tractor weights to the front?
adjust the camber (?)
remove 1 set of tires and turn it into a 4x2? If so, could I cheat and remove the rear set, put it in 4 wheel mode to get a shorter turning radius?
Regards,