Hi Brocxen,
As Michael mentioned, we have a feature called local NTRIP Caster. It’s a way to send NTRIP corrections to your drone controller via the base’s Wi-Fi hotspot. Our DJI users confirmed that it works fine for them. So, if Internet access is unavailable, this feature can help.
Our LoRa can work only with Reach devices. But if you have a second receiver from another manufacturer, you can use a couple of external radios for the base and rover. If the Topcon G5 can output GPS observables and ARP coordinates in RTCM3, it should work well as a base for Reach.
I’d also recommend our new post-processing software, Emlid Studio. The latest version is capable of geotagging photos using timestamps generated by DJI drones.