From what I have seen, the end of the Wicksteed lake nearest the entrance seems to have the largest waves if the wind is blowing - which it often is.
From a personal point of view, what I would like to see is an area for the more sedate scale boats, maybe at the far end of the lake, which has a simple course and some docking features etc. which would enable scale boats to show off their paces without conflicting with the more exciting stuff. The far end of the lake does tend to be rather under utilised as most of the action usually takes place at the entrance end so this would spread the models around a bit and make maximum use of the water area.
Rather than make course obstacles specially, maybe some of the supporting clubs could bring along things that they use on their own waters, bearing in mind that Wiksteed is a constant depth.
Yes, all this needs a bit of organising but the usual turnout shows that there are plenty of people available who can help in both the preliminary planning and on the day. Their talents just need to be tapped. In the past there has been a bit of an imbalance between the large numbers who simply turn up to enjoy themselves and the few who actually stage the event, including the sterling and perhaps under appreciated efforts of the local Wicksteed club.
The Mayhem gathering has now got past the point where a general free for all is acceptable. A Steering Committee needs to be set up to work in partnership with the Wicksteed Club to really make the most of the weekend for everyone.
I would also suggest that attendees be invited to contribute to the cost on a voluntary basis as last year a very small group were landed with the bill which seems a bit unfair to me.