If that is not an option, and you are going over, turn the vehicle off and hold on to your seat-bottom and hope the seat belt works properly. There are other scenarios, but this is the least drastic. Use enough momentum to get up and over the hill. Avoid high centering on the crest. Use the engine brake method for the descent.
Rollover CAN happen.
Practice backing down. 4 - Reduce the tire pressure. This improves traction in all conditions, especially sand. Remember that ground clearance has been compromised. Reinflate before driving on the pavement for any distance.