Have a look at the following site.press release on decks.feedback on decks.
The area is mostly forest and plantations and definatly worth a day visit.
It is on the mountain side of the N2 National Road and therefore not so close to the ocean. My suggestion as a circular drive that start at Keurboomsriver and end at Knysna at the Knoetzie turnoff. This take you past the Valley of Ferns - a beautiful stop for a picnic and short walk into the forrest, the Big Tree and the camping decks. the are no real activities, other than the scenery.
October is a good time. Part of the road is gravel, but were in a good condition the last time we were there. Watch out for big trucks that transport the logs. Avoid the roads shortly after or during rainy conditions.
Enjoy - a unique experience, but don't do it at the cost of missing Stormsriver Mouth. That is still the most beautiful place on earth!
To sleep a night in the bush must be a special experience.
The Creator is bigger than His creation!
My latest trip report to Addo during June 2009:http://www.sanparks.org/forums/viewtopic.php?f=27&t=34300