Hi Norman,
as you've probably realised Littledean hasn't been discussed much in the forum, unlike some of the other local churchyard's, I can only find this related prior post.
http://www.forest-of-dean.net/fodmembers/index.php?id=45404
Tichfen's not visited the forum for a few years but it seems they are still active, their username is still being displayed as a blue hyperlink. I suggest it might be worth sending a direct message in case they can help you.

I also suggest contacting the Church in advance of your visit, the Cinderford area vicar Mike Barnsley seems a pleasant sort so it's possible they might be able to help out, especially for a small donation towards upkeep, perhaps.
https://www.cinderford-churches.org.uk/contact/

As an aside, I'm sure you've already seen it within the Memorial Inscriptions part of this site's Resources section, but the Bigland Transcripts from the late C18th include Littledean.
http://www.forest-of-dean.net/joomla/index.php/bigland-transcripts

Should be a lovely time to visit, hopefully dry mild weather so good underfoot and some spring flowers too; I cannot speak from experience wrt Littledean but some of the area's churchyards can get overgrown in the summer. I sincerely hope that the terrible damage suffered by some local cemeteries doesn't happen at Littledean, it's probably a bit far from the woods.
http://www.gloucestershirelive.co.uk/wild-boar-break-into-forest-of-dean-churchyard-and...

Good luck !