I think some people like you @on it will moan and complain and probably are better off playing anyway.
If you need an explaination, the reason why I dont bother too much with trials around here is simply the quality of terrain, and access to suitable spots, you are so lucky where you are its a shame you dont realise it...... and if you think its cos Richmond is "different" Im guessing you dont know what real trials are.
For the best part of 10 years i struggled with one other person to secure a piece of land for a practice area in Milton Keynes which is as good as it gets imho round here, so I dont need any advice from you either.
Whether I know best is neither here nor there but clearly its time for you to see things more objectively?