Brian, let me tell you what I was thinking here...
The data that is used (or would be used) by the community is a mix of data that they collect themselves, data that they get from others (as you have described) and data that others are collecting that they could/would use if they could get access to it. So my thought is that we need to get an idea concerning the data that they are currently using (and its source) as you mentioned but also it would be useful to know what data they might use if it was available (the checklist). This is something that one would find out by spending time in the community or by interviewing or doing a survey as you mention.