How about 1 meet per year.
4 prizes:-
Mad and muddy class... Most Mud.....&.... Most Trashed
Clean and Cute class....Best Outside....&.......Best Inside
Or 2 meets per year one Mad & Muddy in a pay and play
and the Clean & Cute one on forestry tracks or at the seaside.
That way the two extremes get their own meet and all the rest get two.
Personally I would have the judging in the local town with lunch in the village hall so that the locals see all the Fronteras lined up.
Youse could even let the locals judge like they do at concours events where the public get a bit of paper and just put the Reg No. in the space.
Over here it happens all the time. Every time there's a Fete the local council pay for a meal for all the car enthusiasts or Horse Driven Stuff or military re-enactment or or or clubs who sign up.
Twice this year I've had a Sunday afternoon procession of classic cars drive past the end of the lane (drinks and deckchairs job) 'cos they all want to be photoed in front of the neighbours Chateau.
Then of course there is the 2Km straight bit through the forest and out into the open that they hoof it on. Them Ferraris and Iso Griffos .... when they howl. Mind you a Cobra giving it laldy into the distance don't half prickle the back of the neck.
Last one,3 weeks ago, was for a , can't remember the name of it, charity and there were 199 classic cars; 4 hours of it.
If the Farmyard Obstacle had been mobile I could have made it 200 Classics.

Or you could just copy Bala, it works.
If you need something done quickly just ask a busy woman then get the f"k out of her way.