Put jacks down to stabilize camper in winds?

When we had our Lance camper, if we were not staying more than a night or 2, we would not put the jacks down. We were in a provincial park when at 6 am a severe storm came through, close to a tornado. It was later deemed to be a wind shear. Hundred of trees were downed, including one across the back corner of our camper. Luckily for us, the suspension of the truck let the weight of the tree lower the camper and then it came back up. It was difficult to get out the back door, but we managed and got saws to cut the tree (diameter about 12 inches). Ropes were used to suspend the weight of the tree and swing it away from the camper. The top of the ladder was all that was damaged. If the jacks had of been down and the camper somewhat rigid, we think the back corner would have been crushed. It was one of those lucky situations.

PS - no severe storm had been forecast and there are pictures in the park office of the destruction