I am a Lymm member. I guarantee you nobody will bother if you sleep by your rods.
Lymm AC in general tries to offer something for everyone. For the carp angler there are a few options:
Shakerley - also avail on day ticket - big doubles and twenties. Classic country park-type water like Sale/Chorlton/Clifton.
Belmont - easy,busy, small runs water, doubles, odd 20.
Lymmvale - doubles, odd 20 but lots of tench to wade through
Tabley Moat - Some serious fish(rumoured 40 recently), gorgeous water, restricted bankspace
The club also offers some barbel fishing (Dane and Severn) and general "maggot drowning".
The club is certainly not "anti-carp angler", but it is anti "carp squaddie". If you leave litter, make too much noise, get pissed on the bank or generally behave like the modern day carp yob, you will be out - and good riddance!
In my opinion the club does need new carp and barbel waters to reflect the modern fishing scene.
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With my silken line and delicate hook......I wander in a myriad of ripples.....and find......freedom