Connecting Gateway to (Campbell) logger

Hello, I am completely new to LoRa and would like to explore the possibility of creating an offline network with several nodes and a gateway that either (1) stores data internally, disconnected from any server, or (2) ideally connecting the gateway to a ready made logger, such as Campbell Scientific loggers.
For (1), I am hopeful that using a RAK7246G would allow local data storage on the raspberry pi module / micro SD card.
For (2) I am interested in following this approach that linked a gateway to a CR1000x logger.
Any input is appreciated.