The Cederberg area is sparsely populated and thus the likelihood of seeing any other persons besides fellow hikers is minimal, and even that is relatively rare. Crime has therefore not been an issue. Currently the large portion encompassing the Wolfberg arch and Cracks and Tafelberg is closed. The northern and south western areas are still open, however.
For topographical maps of the area (including water sources, campsites, routes and landmarks), follow this link to Slingsby Maps for digital copies (https://slingsby-maps.myshopify.com/products/hike-the-cederberg-2-digital). You can also buy hard copies at that sight or at Algeria, numerous other tourist outlets, outdoor shops, etc in the Western Cape, but given you aren’t familiar with the area it may be good to plan your route some time in advance. I can vouch that they really are worth it, as there are no route markers (other than cairns) of any kind on trail.
This blog has brief descriptions and some photo’s of many of the places named in these maps (http://cederbergnames.blogspot.com/2013/07/place-names-in-cederberg_28.html) for further reference.
Just in terms of the weather, it can snow in the Cederberg and reach sub-zero temperatures. Coming from the USA I’m sure you’ve dealt with this before, but don’t leave your warmer gear at home because you’re coming to sunny South Africa. These cold fronts can arrive and leave quickly, so forecasts longer than a week in advance aren’t always trustworthy.I’ve found https://www.mountain-forecast.com/peaks/Cedarberg/forecasts/2026 to be resonably accurate for our local ranges.