If your wife has that fear - and after what happened it’s not unreasonable! - a pop-up on a 3/4 ton truck is the best possible way to go.
I know people who recently lost gramma and granddaughter, and seriously injured other family members, when a front tire blew on their very nice late model diesel-pusher motor home and it rolled. A friend who is a truck mechanic had just checked those tires and they appeared in excellent shape, The guy driving the rig owns a trucking outfit and knew what he was doing.
In your situation, none of the other usual hard side vs. pop up issues matter. The pickup with the low profile pop up is the only thing she’s gonna feel comfortable in. And they do make really nice pop ups.