I just did the hose and valve replacements.
The deck plug on Wanderer is the same as Mark describes. However the tank is shaped like this as you look horizontally:
| / i
So in the older versions Amel avoided the long interior input pipe by reshaping the tank. it's interesting to see what generational changes they made as time went on.
It seems like the only difference between changing the outlet pipe and the long input pipe would be trying to reinforce the connection so the pipe would resist the sloshing of the contents and stay upright.