First over night hike

Hello Toris and welcome.

In terms of the time you want to spend travelling I wouldn't go further south than Injesuthi.
If you are tenting then your options are limited only by your imagination. You could head up the chain ladders from witsieshoek (there is a dedicated thread for this and related trips) or spend a night tenting in Didima, Monks Cowl or Injesuthi areas.
My suggestions for relatively easy caving trips would be Xeni or Shermans cave in the Didima area or Lower Injesuthi or Marble Baths caves in the Didima area.

If you spend enough time searching, there is a fair bit of info for first timers on this forum.

A note to the mods: perhap a dedicated/sticky beginners thread is required.

You can camp anywhere, the only rule is that it should be at least 3km from the carpark.

But asking for a specific area to camp in is not a dumb question. In the lower berg areas are often uneven, overgrown or not near water.
There are some "hiker made" camping areas which are always useful to know the location of.

Hi Tertius, Suikerbosrand and the Magaliesberg would easily fit into your 3-hour criteria (which the Berg mostly won't). Have a look through the Magaliesberg and Other Mountains categories.

Toris wrote: Thanx for all the suggestions guys,ive booked the marble bath cave at injesuthi for next saterday,its a bit further than i wanted to travel but thats okey!

Enjoy! There are 2 caves there, so check both out & decide which best suits you.
The one on the left is generally better, and should take 6 people comfortably

Toris wrote: its a bit further than i wanted to travel but thats okey!

You won't regret it!