Me and a couple of mates did a WW1 battlefield tour on Royal Enfields a couple of years ago.
It was organised by a chap called Pieter Clarysse, who runs a small Royal Enfield dealership/ motorcycle workshop in Merkem (few miles from Ypres, about halfway between Ypres & Pervyse where Elsie & Mairi were stationed). Part of the local history includes this story of Elsie & Mairi.
it was a fascinating and thought provoking few days and I would thoroughly recommend it.
Enjoyable is not really the right word, but it was a great experience and I would like to go again.
Pieter can organise accommodation as well (we stayed at De Klaproos B&B, which is opposite Pieter's house & workshop). WW1 still seems to be a big part of local people's lives and the daily remembrance of it seemed to me to be a genuine thing (not all of it hyped up for the tourist industry).
The bikes come with sat-navs preloaded with routes which take you around all the back lanes, visiting the well known large sites, but also lots of small sites that you may not find on your own
if anyone's interested this is the website:https://www.enfieldtobattlefield.be/
the BMW not with us, but the Blackjack Avion is our non-motorcycling friend...
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1980 Yamaha XS850
1981 Honda CM200