Terrain Analysis

I am thinking of building an R wrapper for my RichDEM raster terrain
analysis library (https://richdem.readthedocs.io/en/latest/).

The library's been designed in C++ with this in mind. The only
requirement is the ability to pass pointers to raw POD arrays to the
library.

My question is: which R package would be best to use for storing/loading
raster data?

Best regards,
Richard Barnes