The track ends at the Botrivier informal settlement as far as I know. From Caledon you might be able to pick up the service road again, but as Blikners said, you'll probably run into overgrown, washed away roads or locked gates. If I were you, when you get to Botrivier just go left, through the township and when the road turns to tar, you'll see the van der Stel pass (dirt) going off to your left. From there you have a few options - go to Greyton and then find some dirt to get to Swellendam.
If you find lekker service roads, let us know.
