[Stripit]

There is a small fine screen where the hose attaches to the trailer, look to see if that might be plugged or restricted with crud. Just to make sure that the park does have decent water pressure before blaming the trailer. The sewer odor could be loose connections at the black tank to toilet seal. Could be the valve that is connected to the handle you pull to open and close is leaking into the basement underbelly. If you decide to cut an opening under the plastic bottom to have a look, let me know and I will explain how I did it so you can reseal the opening without having any issues.