Modern RV Safety?

My dad has a 90s era RV that he really wants me to borrow to take our kids camping. Our kids are 10 and 7. They both still ride in boosters (10yo is small).

I know RVs aren’t structurally sound outside the vehicle can. A crash in one is really bad for anyone riding in the cabin. Also, from what I’ve read, if they do have seatbelts they likely aren’t bolted to the frame. And even if they did, an accident is going to send tons of stuff flying around.

I’m going to pass on borrowing the RV but even if you don’t have kids, some of these RVs have bunk beds and tons of sleeping and all that, presumably for a family, but that family should drive separately? Seems dumb to me! Even if it was a group of adults it seems like a bad idea to ride in the back cabin!

I really like the idea of an RV but I think trailers make more sense from a safety perspective, although they have their own sets of pros and cons.