We actually drove into your complex at the back end (October I think) of last year and saw the construction work going on for the caravan site. The exit we used (from the shops complex etc) was very steep with a steep slope where you had to stop to get out onto the main road. Our caravan was on the CC&C site at Delamere. I think if this is the exit intended for caravans it may cause some problems. I may be wrong here I'm only working from memory, but remember mentioning it to other half.
Wifi is a necessity these days and not overcharging (I think a £1 a night is not overcharging). Though I have to say these days when lots of coffee shops, hotels and venues provide wifi for free I think this would be a plus point especially if 3G coverage is bad where you are.
Decent sized pitches, not too regimented, with planting for interest and privacy is always nice. Agree with others about balls, bikes and dogs and regards respect for peoples privacy on pitches ie kids not cycling walking through others pitches.
Excellent clean and accessible loos is an absolute must. I use a wheelchair and lots of loose chunky un-compacted gravel make a site impassable, I notice it makes it difficult for many people to walk on too, so the smoother you can make hard standings the better.
I think getting the right balance between friendliness and strict rules and between a regimented car park look and a lovely natural environment is important. Like everything else we buy or experience the thing is getting the feel of the place right and providing excellent customer service. Get that right and you've cracked it.
Good luck, sounds like you're 3/4 of the way there.
Oh and we will be over for a visit, not too far from North Manchester for a weekend visit. (may even be interested in storage if secure and reasonably priced).
Many thanks for your interest in our views.