Can I just say...WE LOVE OUR ANDERSON LEVELERS!!!

Here's the one I have, a CAMCO 25563

With those axles, you might be able to get away with it, since one axle will stay on the ground, especially with only and inch or two.
Of course, another benefit is that you are chocking the wheels, as well as lifting them. Personally, I'd stick with two to keep every symmetrical,