Good question.

I run Firestone Destination A/T's on mine, but they were affordable and available when I bought them.

Look for one that has a little knobby to it, but also one that would be good on the highway for miles and road conditions like rain at normal highway speeds. Keep in mind that most "car" or "light truck" tires that are good for miles, will get you stuck in grassy terrain since they allow you to get grass stuck in the treads, making them more like racing slicks....

More often than not, an average Light Truck A/T tire will be a good all-around tire for occasional ORV use.

Remember, sand driving is different than mud or rock driving and you will have different reactions with any tire in different conditions with different air pressure.

I find that when I am driving on the beach, in or out of the dunes, my tires do quite well when I drop TP to about 15 pounds, but have run street tires with the right deflation on the beach and did quite well also....

Hope this helps a little.

Good luck and keep us posted. We learn from eachother here!