Thanks for all your comments.
A few comments:
+ Everyone is stoked to be on holidays, but everyone is there to surf
+ If we are not alone at the break then we don't just dump ten in the water - but when we are alone, surfing in shifts has not worked well.
+ I am raising it now in the hopes of being able to ease-in some suggestions so we avoid problems on the trip
+ I personally don't have a problem - I normally take off pretty deep - but I know that if there was a 'system' then I would avoid any potential SUP-hog claims and the shoulder dwellers would be happy too
+ I personally don't think that the shoulder-dwellers should have fewer waves than anyone else. If you are unfit, then you don't get as many. If you paddle and miss, then you get fewer waves. But if you are not up to going deep, then I am not sure why they should expect fewer waves.
One unique 'issue' we have is that we are not all
exactly 'mates'. One of them is my brother-in-law and we are mates. The rest are guys we have met through surf trips. On this trip we will have three people I have never met. So we are not mates enough to be
fully generous about wave sharing, nor do we know each other well enough to be truly honest about hogging. Drop-ins cop it though

The vibe is good and we encourage each other, but a lot goes unsaid...
I like some of the suggestions though. The threat of the pink shirt may be enough to make everyone behave.