I think a on off weekend event with 2wd on the Saturday and 4wd on the Sunday with the following format would be very popular and would perhaps steer sv into a busy venue thereafter.
1) 2 rounds of 3 minute practice in a random heat order.
2) heats then reorganised in order of drivers with fastest 3 consecutive laps. (Petit style)
3) 1 round of 5 minute timed practice in new rearranged order
4) 4 rounds of qualifying and 3 leg A finals.
With the following implementations:-
1) the track NEEDS to be sugared
Why?
2) power NEEDS to be available
We all have power for other meets, why is this venue needing outputs that bad?
3) time between heats NEEDS to be about 2 mins
4) time between rounds not more than 10 mins
5) a commentator would be very nice
Who has one of these?
6) if you could get rc tv to attend it would be excellent for prestige and venue awareness
You need £500-£1000 for any tv company to attend
7) a friendly atmosphere is a must
Only the racers can make it friendly 
8) a tyre rule of 1 set of 1 type of tyre is needed
Who will scruitineer that?!
9) a raffle with good prizes would go down well
They already offer prizes, and trophys, and champagne
10) a major company sponsoring the event would be good
They do - CML/Proline
11) the date NEEDS to not clash with any other major event
Impossible for anyone these days
12) the jumps need to be more flowing
The new layout has helped alot
13) a main straight is necessary preferably starting down a slope to help get speeds up
That's all I can think of for now but if you could hold a meeting like this I'd be a certainty to book in..