No special access issues
About 1 hour and 30 mins car ride from HCMC. When you get there, you will see local stores selling food and drinks. They don't have a lot of options so it's bettter if you bring your own food. From there, you will also see signs that will direct you to the different boulders of the area.
Note : Some of the areas are season dependent. During rainy season, it will not be possible to climb some of boulders due to flooding. Information about the access of the boulders are on the topo.