Sold my old rig and starting over -- Need advice!

There are two ways of increasing safety while traveling in a vehicle. One way is to prepare for an accident.... therefore seat belts; car seats; air bags; helmets etc. If I was planning on a head on collision I'd definitely insist everyone wear their helmet. The other way is to avoid the accident in the first place. Driving a crew cab diesel pick up pulling a fifth wheel you will be far less likely to loose control and crash than towing a TT with a van.