2 miles is very far for most radios including LoRaSerial. I would not recommend LoRaSerial for 2 mile transmission it unless you have large antennas and a clear line of sight.
If your site really does not have cellular reception to allow RTCM over NTRIP, you have a few options:
- You could use the RTK Facet L-Band (assuming you are in the coverage area). The corrections come over a geo-synchronous satellite
- You could setup a base on site. See this thread.
- You could get a commercial surveyor grade packet radio like the Harxon Radio HX-DU1603D. You will likely need to obtain a HAM radio operator’s license to legally operate any surveyor grade radio.