How can you ride quads through the cederberg? Its a public road! Do you see quads on the N2?
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...and, as well. My tool supplier have been doing 4x4 camping trips for 20 odd years. His words to me: when you find a nice spot, tell no one (difficult), because tomorrow it's in Getaway and the next time you go there...well, you get the picture.
Went to places like the Cederberg, Baviaans and Die Hel in times when "Adventure bikes" were not invented yet and people asked me why I ride around on a farm bike and don't get myself a decent GSXR or Fireblade

Some of the "old" places I visit on a regular basis and might not be too aware of the gradual changes but with The Hel it was six years between visits (2001 - 2007) and while some changes were positive (upgraded & staffed camp site) others - while probably still in the general visitors best interest - displeased me (Gamkaskloof Kiosk having evolved into a fully blown restaurant & gift shop, abandoned farms in the valley bought up & developed).
I wonder if I should dare to go to Baviaans, my last visit was in December 2002

The West Coast road from Dwarskersbos to Elandsbaai not long ago a corrugated sandy stretch of desolation is now a smooth band of tarmac. Once they fix the last six kilometres into Lambertsbaai you'll have HOG Cape Town thundering up the coast to LB for Sunday lunch. Yes it's their bloody right to do it and I see the benefit of tar roads for the local exconomy but I still don't like it for myself.
Pakhuis Pass tarred already? Pearly Beach to Stuisbaai apparently is next? The road to Kosi Bay? And Sani?...
Go there while you can and while it's still nice.
I still remember roads like Monte Capatone (sp.?) & (the old) Passo di Tremalzo from my days in Europe, DS heaven within half a days ride from my home in Munich. Now all illegal, you're lucky if you're still allowed on the old military roads with a MTB.
To find some (legal) dirt you now have to go to Romania, northern Finland and Russia. Farked up by the hooligans with plastic bikes & DS bikers who raced (& crashed), made noise and pissed off all other visitors rather than touring & enjoying the scenery.
Expect the same here, enjoy it while you can. It will not last.
The best possible scenario is DS riding going out of fashion like all those other trends ideally before the Akra & Penta racing fraction have farked it up for all.
My bike is quiet and is less likely to offend a land owner or chase an ostrich into a fence than a noisy one.
If you feel you need to have that racing sound be aware that you're helping to dig your own DS riding grave. And don't give me that "oh but I tap off when I go past the farm house" crap.
Enjoy it while you can.