Well.
There is a web site
https://sites.google.com/site/highlandmemorialinscriptions/home/badenoch-strathspey that has transcription/indexes of gravestones including Laggan Kirk, and the information contains any place mentioned on a stone.
There are 79 place names altogether. Six are overseas, three in England and sixteen in Scotland but not in Inverness-shire. That left 54 places. Of these one (Fort Augustus) is in the parish of Boleskine and Abertarff, three others are in parishes around the Great Glen - Kilmallie, Kilmonivaig, and Inverness - and one which could be in Abernethy and Kincardine.
I then looked at the indexes to places in the OS Name Books at
www.scotlandspeople. The parishes of Laggan and Kingussie and Insh are indexed together, which is mildly annoying but doesn't really matter in this case because Kingussie and Insh are both east of Laggan. Using those indexes and the old maps at
https://maps.nls.uk/ I was able to identify all but six of them. None of these came up in Boleskine and Abertarff in a full search of Scotland's Places. They are Achnabeaghan, Braeroy, Croftlaggan, Faegour, Glengarth and Lagg (as opposed to Laggan).
The only gravestone in Laggan Kirkyard mentioning anywhere in Boleskine and Abertarff is the Fort Augustus one, which was a burial in 1923, late enough for the body to have been taken there in a motor hearse; and it if had been carried, the most direct route from Fort Augustus would be the much better road over the Corrieyairack Pass.
So if there was ever a tradition of carrying bodies over from Whitebridge, it was not accompanied by a tradition of erecting gravestones with inscriptions recording the fact.