No, would not stop us at all. We live in Indiana, another tornado alley. If you stop and fret over something that may never happen, you'll probably never go camping.
We've been through 2 tornadoes while camping over the last 30 years of camping, from tent to trailers. And both times, we were relatively safe. And actually, if a tornado comes, you really do not give a hoot about your RV at that point. That's what insurance is for. You get to a safe place (not inside the RV), and join everyone else who is panicking. Last time this happened to us, we gathered in the women's restroom (block building), and we all started sing-along songs to bid the time! Funny, the dogs in attendance started howling. I think we all had a marvelous party. So you know ... tornadoes are really not all THAT bad!