These are very good ideas and I think I can implement a couple of them. This is why I like forums because I tend to get stuck in my thought and have trouble seeing my way out.
I'll use the rubber connectors between the pipe sections. This will seal the pipes and keep them together in a fashion where there is flexibility. Good idea.
Using the rain gutter idea I can sleeve the accordion hose in a way that no one will pay much attention to it thus allowing the hose to expand or contract as needed when the coach has returned from the beach.
I plan to remove a small section of the pipe. It is currently about 14' long. I'll take out a four foot section. This will help in two ways: 1) it will shorten the run and lessen the uphill grade to the sewer connection and 2) it will provide afternoon shade sooner as we will then be shaded behind our neighbor's park model home.
We don't stabilize our motorhome (we can bug out in minutes after a good idea) so I know this thing moves about and that isn't good for the current fragile pipe set up.
Thank you all for your input.
Montana