Ditch-Witch tires seem like they would work very well. they are a V-tread tire and i have seen alot of them on the dunes in Michigan. the Skid-Steer tires have a very stiff sidewall (like a trailer tire) because of the lateral forces the skid-steer puts on them when turning. ditch-witch tires don't need strength in that direction. i think i have seen the ditch-witch tires by goodyear in 33-15.50-16.5