We have moored at Ventnor Farm (now just "Ventnor Marina") for almost 15 years. The current charges are very reasonable, particularly if you take a three year deal, and having visted several other marinas, we have yet to find one with such peaceful surroundings, helpful staff and, most importantly, a very well designed, uncrowded layout.
Just a few points on the matters raised:
Our original T&Cs restricted overnighting to five continuous nights. This type of restriction is usually due to conditions imposed by the council in granting planning permission.
The original owner liked to create a "membership" atmosphere, hence the restriction on fueling, quite apart from the difficulty of getting into the fueling berth!
Without prior consent of the owners, work is restricted to "minor running repairs or minor maintenance...not causing any nuisance or annoyance to other users."