Dear June
I cruised past a couple of days ago, on the way to Ely. My impression was that the park looked very tidy and well run.
I didn't see the notice about how to enquire about moorings (as I recall, a phone number and a discouragement to call at the bungalow?) until I had nearly gone past. So I would suggest you might consider a notice at each end of the marina, saying who you are and whether/where/how visiting boats are encouraged to stop. In biggish letters, so we can read them...
As I recall most of the earlier postings were about whether passing boaters could stop for the night, as proper overnight moorings are not that easy to find on the ML. We stopped for lunch for 30 mins by just tying up to the flood bank a few hundred yards further on, which was fine.