What sort of pressures are you running?
Had a trip away last weekend in the sand. 2 x D3's in the group with AT tyres running around 18psi never looked like stopping in soft sand. The 3.0lt D4 in the group running 19's with higher pressure got stuck a couple of times before we aired it down to the same numbers.
Spoke to a ranger who runs at 15psi all the time when out.

