Extended range or remote nodes tie in

I live on an archipelago of what can be somewhat cut off islands and we have a need for emergency communications. The Meshtastic pods could serve as a very useful connection to local residents. Has anyone thought of how to tie into a data network like the AREDN mesh? I have a small AREDN mesh I have set up for demo purposes and am trying to set up a full-size high-speed data link to one of the other islands. The idea would be to use the data network as the backbone and Meshtastic as the final leg. Basically the tie-in would be via the app.
For more info on the AREDN mesh go here to