You have definitely come to the right place for information!
Are you staying at Cathedral Peak hotel or is that just what you are looking at at the moment? If you are looking at diversity, the Southern Drakensberg is by far the best you will ever come across.
My personal view is that the best 2 nature reserves in the Drakensberg are Didima (Cathedral Peak hotel - northern range) and Garden Castle (which has Drakensberg Gardens hotel - southern range).
If you are looking for views within a 4 hour walking range, Didima is better, but Rhino Peak (at Garden Castle - 20km 8 hour day hike, not very easy, but easier than the Bell traverse from what I'm told, I personally have never done the Bell traverse) is one of the shortest routes to the top and comes with an amazing view over the area.
My personal record on animals in the berg, by area is as follows (referring to larger animals, not birds, snakes etc as you will probably see these no matter where you go):
- Didima - never seen animals there
- Garden Castle - I have been there around 8 times and seen eland at least 6 times, I have also seen lots of baboons
For activities, if you are referring to indoor activities, the hotel websites may be useful, but I have never stayed at a hotel in the Drakensberg, always a tent, mountain hut or a cave. Once again Garden Castle (or Bushman's Nek - the reserve south of Garden Castle, literally the bottom end of the main Drakensberg Range) have lots of amazing pools. But all areas in the Drakensberg have rivers which are usually suitable for swimming in, and due to how clean they are, you can generally drink from them (provided you aren't too far from the mountains). The river on the road into Garden Castle also has tubing on it.
I don't know that smugglers is a good thing to put on your list, but my suggestion of the Rhino Peak hike definitely covers that one! Although they are probably shepherds more than smugglers in that area, but they are definitely high altitude Basotho's who live in a very tough environment by very old traditions, so they are definitely of interest. And on the bright side, they are usually the friendlier than the ones further north, so if you give them some sweets (not wrapped in plastic as they litter), they will probably be friendly to you.
By personal preference I would recommend Garden Castle, its the most diversity you will find in the range. If you stay at Drakensberg Gardens hotel, provided there are enough interested guests, they even do a guided walk up Rhino. Further to this, I'm not sure if the nature reserve still has guides for hire on this hike, but they definitely did a few years ago. It is also a very well used path, which is fairly easy to follow without a guide (weather permitting). You also have the option of doing Rhino peak as an overnight hike, stay over at Pillar Cave (which is a rock overhang, not a deep cave like what most people picture when they hear the word "cave") if you don't mind roughing it for a night (the cave is fairly close to water and its floor is flat, so its pretty good as far as caves go).
In the interim, since you can't get the latest maps in the US, you can download the old ones (which are only slightly outdated in some very small aspects such as peak heights, mountains don't really change that frequently

), go to
www.berg.co.za/maps_index.htm , it may help you with planning.
When you are in Cape Town, makes sure you go to Cape Point (which, contrary to popular belief, is not the most southern tip of Africa, that would be Cape Augulhas, which from what I hear doesn't really look like anything). At Cape Point, walk up the steep bank from the parking lot past the old lighthouse, and down towards the new light house, there you will get the view of one of the highest sea rock faces in the world, being there is one of the most amazing feelings.
Ps. Once you have been to South Africa, you will want to keep coming back, its such an amazing country (and yes, I know I am biased!)