Premise: A community of people (150-200 or so) are obligated to live isolated from the rest of society, and without technology that involves the use of electricity. They have been living this way for the last 100 years or so.
They are isolated in the sense that other people are able to visit the community (rare occurence as very few people know of its existance, nor would choose to live without modern technology) and community members are able to venture into mainstream society for short times if necessary, but this poses substantial risk to the person involved and they are unable to remain long. This is rare.
For the most part, the community is a completely separate society. Set in North America, most similar to indigenous tribes pre-contact, they do not use money, are hunter/gatherers, and mostly ignorant of the outside world.
The limit on electricity is anything that generates or uses more than a biological level of electricity can not be anywhere near community members. Things that have been created using electricity and are then inert are fine.
Question: What could be something that would also obligate a connection to mainstream society? A reason for people to have to visit the community, or for community members to visit society? Or both?
I'm assuming if the community has existed for 100 years they are capable of meeting their own basic needs for survival. I'm also aware that humans lived without electrical technology for most of our existence, so I can't imagine that limitation could create a dependence on outside connection.
Goal: Exchange of information, to have the community aware and not completely ignorant of modern day society, to include characters in the story that are not from the community, to have some community members who have experiences in the modern world