I've heard to always go into the bush in 2WD, so that you can use 4X4 drive to get back out.
I also like those bubble-level tilt indicators you stick on the dashboard, because if you roll over the vehicle you can also be "stuck" (and [email]Fv@$-d[/email] too if you are hurt).
Something to consider: my service manual prescribes quite a bit of extra maintenance any time the truck is submerged over axle level.
run
:-)