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First of all, don't sit in a booth. They are not the safest place. Sit in the front seat and use the shoulder seat belt.

It sounds like this was hubby's first drive with your new motorhome and perhaps he was going too fast for the road conditions or was distracted in some way. Hopefully, he has learned from this or is this typical of his driving? If so, he needs the driving lessons. If you both can talk it out and understand why he went off the road more than likely it won't happen again. He needs to take some responsibility for the fear this has instilled in you.

You also stated that you had driven your smaller RV. Are you willing to take lessons and drive the bigger one? Perhaps you need to get it across to your husband that you need to drive this one, also, to gain confidence. Good luck.