How far did you get Ed?
Last time I headed down there there were still rocks under the bridge just after the dessert, is it now passable right through the forest?
If so I might give it another try, I haven't been down there for ages, I tried it with a variety of entrances and exits, but I could never get any of them to link up. I know a lot of locals go down there and cut through the woods (illegally) to get to what look like some cracking mud pits (from the pictures I've seen), but I've never tried it (I'd rather keep my licence
)