It is hard as a lot of people want a serious( ish ) competition ... so you have to have rules. People will then pick lumps out of the rules.
The best attended clubs that I've been to, on a weekly/fortnightly basis, just set out courses and then say just shoot them how you want. The only rule is be safe and legal.
I enjoy those as a day out practising but I prefer the added thrill of a proper comp.