Hey dave there is a nut behind the steering wheel cover that you can snug up a bit.If you look in between the steering column or shaft you will see a wave washer or shim.You can tighten the nut up some without making it steer to stiff.Behind the steering wheel there are torque screws that you can take out to remove steering wheel cover to access the nut i am talking about.
That nut just holds the wheel to a splined shaft. The steering wheel itself has no slop on the shaft since it is held on rigidly by splines. The problem must lie further down the line. I'll do some exploring.
I checked with my Prowler dealer and he checked the brand new models for steering slop. They have about 1 inch of left-right looseness. Mine has about an inch and a half, so that's probably about normal for having about 250 miles on it.