I pull a 210 lb bike inside a single axle 6x10 cargo trailer. Despite being tied down securely the bike and loose cargo gets tossed around pretty good inside the trailer. It's a much more violent environment than when behind the SUV. I suspect the long distance from axle to hitch amplifies any sudden movement, however slight it might be. I could tie the bike down with more points . . . .
Cargo trailer is nice because everything inside is clean when I get there. Security too.
For backing with the trailer I turn on the backup camera. You can center on the marker lights and top edges on the trailer. You know pretty quick if the trailer is straight. Backing into a camp site would be pretty tricky . . . .
Best,
- bob