The end result:
I found a rubber boot that clamps to the park's sewer connection and then to the long black pipe leading to the motorhome. This is some very random angle that isn't 45* or even 30* so it's clamp tight and not leaking. I glued all of the existing connections minus this one which is what the park wants.
I then used another clamp on the other end of the pipe. Cutting my accordion hose to 8" I put that into the one side of the clamped end and tightened this down to hold all but 2" of the accordion hose. This two inches takes away so much burden. Nothing here is 90* or even 45* as the layouts are all wonky. This allows enough flex for the coach to move (bounce), handles the strange angle to the sewer connection and makes the run to the sewer connection almost level, which is better than uphill as it was prior. This also eliminates the precision required when we park to make all these weird connections work.
By removing a couple sections of pipe I was able to move the motorhome back another 25" which puts our coach in the shade at about 2pm. This is fine as the sun is hitting our solar panels early and we get several hours of good production out of them. Goodness, we have 750w up there, we can't use all of that if we tried.
I recognize I tend to overcomplicate things. In the end however, I tend to find a simple enough solution to handle the problem with little to no significant expense.