it's not exactly easy to find stuff round there, only been up there once and it involved a bit of getting lost and swearing. and it is quite a trek out of plymouth, suppose it's depending on how far you can cover. and where you can find to stay. that's why i recomended the tamar valley railway, you can get up on a really scenic railway line and hop off at bere alton and then ride up the disused rail line from there, according to the other half.
but if you do go to the area round burrator, pop into sheepstor church. i was part of the group that did their heritage stuff. the stuff we did is apparently being touted as the template for other churches to talk about themselves