Never been that far down. We put in at 1 and go up river chasing stripers. I can only imagine.
About the worst Ive found is Daltons Landing on Broad up in York County.
They built it essentially aas a kayak launch, but you can (and I have) launch a john boat there. Its in a very choppy part of the river and there is a huge rock (think 12' tall by 6' wide ish) immediately behind the ramp which creates a nice dead jetty. But its a full throttle into that pool and then a quick woah and turn onto the trailer....coming off is an adventure especially when the motor stalls, ask me how I know