Easy is very subjective. If you want to hit the KZN Drakensberg, go with Giants Castle area - the trails are generally in very good shape and are often even sign posted. The map there is also pretty accurate. If you are fit enough, Langalibalele Pass is one of the easiest ways to the top of the Drakensberg and is on a good trail the entire way. Alternatively you can always head up Oribi Ridge and follow the contour path along to Bannerman Ridge - which is a scenic route if you aren’t ready to head to the top.
Just make sure that you are carrying a good tent (i.e. a hiking tent, not something from a supermarket), as the wind there, even at 2000m, has torn many tents to shreds.
Royal Natal National Park is the best spot for easy day hiking, but you aren’t allowed to camp outside the designated campsite, so you can’t do a multi-day hike there.