It’s a difficult decision to make really when to stop etc you could equally link sugarloaf holdens farm and many other features into the smithills area the same as you could for a worsthorne group or an Anglezarke group
I fear it may be a little difficult now to get Anglezarke put into a group one possible short term solution is if you want to group up a site with a few others to point these out to people that they’re all in the same area why not choose one prominent site in the group and either add a site within that with hyperlinks in the field notes to point you to the rest in the group its easily done (if that’s ok with ED) or just post it as field notes on one of the more popular sites within the group and insert hyperlinks accordingly.

Just a thought speak soon chaps/chapettes