Yes, you can do that.
However, you might find it easier to eliminate the .ino file from your Workbench project and only use the .cpp file. To do that, try adding the following #include line at the top of your .cpp file, - above your other library #include(s):
#include "Particle.h"
// add the above line to the top of your example code
// - above ALL your library #includes - and run it in the .cpp file ONLY
#include "StorageHelperRK.h"
SerialLogHandler logHandler(LOG_LEVEL_TRACE);
SYSTEM_THREAD(ENABLED);
SYSTEM_MODE(SEMI_AUTOMATIC);
... // the rest of your code here
Here is a link about using the special #include at the top - above - other #include(s) in your code:
https://community.particle.io/t/preprocessors-puzzling-behavior/63196/3