Get some good mud tires for mud hills. You are likley to catch a rut & go over if you wheels are locked. Turn right & punch it if you are gettin sideways. Always not good to slide down sideways into the pond.
I saw this video the other day & was scared for you & passengers.
Looks like you tires loaded up & turned to slicks.
Best bet follow the leader. See what he does. Never wheel alone.