What Would You Do

When we had a Class A I could not see what was in the lane behind me till it was too far back to make out any details. So no I prob would not have stopped.

Being in a large RV in front of what was going on would provide very limited help in reporting the accident.

As for the details, the vehicle at the back was at fault, but the vehicle who slowed down to let the RV in should have been paying attention to what was going on behind him/her. Had they been paying attention they might have realized that slowing down was more dangerous than not letting the RV in because of the proximity of the other vehicle. Being nice is good, but it's amazing how often it actually makes things worse than just following the rules of the road.

Mile High wrote:
If he even saw it. I don't think I would have stopped unless there was a real good place to pull over. Trying to park a big motorhome on the side of the road can be an even greater hazard.

Agreed.

I would not stop if I saw it or not. While the RV must yield merging into traffic he did not cause or contribute to anything.
Any witness, including the OP, can stop if safe and would like to add the statements taken by the police.
JMHO

I sawed it to. Shoulda stopped to help 'em out.

X2 ,and how would the rv know what happened he was in front of the wreck.

I doubt the RV driver seen the accident. If he is focused on merging with traffic he probably didn't see one car rear end another 50,60 or so feet behind him. Besides the driver of the car who rear ended the other car is at fault. He shouldn't have been driving so close, or more probable, playing with his phone.

If he even saw it. I don't think I would have stopped unless there was a real good place to pull over. Trying to park a big motorhome on the side of the road can be an even greater hazard.

I wouldn't pass judgment either way but the guy that hit him in the backend will be at fault regardless if the Rv'er stopped or not.

It would have been nice.