I don't know if its the same in the southwest
But at the BRCA Nationals you can run 2wd in the 4wd class as long as it runs to the 4wd weight limit.
These days 4wd is not that much faster than 2wd. On some occasions I have gone quicker with my 2wd.
So you may be able to score points in all regionals with a 2wd car.
I would say to anyone who has not raced at a regional to give it a go. All 3 venues are very different and all are excellent. Cornwalls mental long straight, Tivertons banked corner, and Worms hilly nature + a great cafe.
Thanks to everyone for getting this organised. Now all we have to do is pray for nice weather.