Hi Susan -
I’ve done The Great Glen Way with Caledonian Discovery back in 2012. We sailed on Fingal (one of the two barges they operate, the other one being Ros Crana) which acted as our floating hotel following us down the GGW as we walked from Inverness towards Fort William (the barges home dock is at Banavie on the Caledonian Canal near the end of the canal).
It was a fantastic week, all meals provided, tea and cake when you returned from the days walk, en suite cabins (small but comfy), large saloon/lounge, guides provided who walk with you each day, etc., etc. The only thing we had to pay for was if we wanted to purchase any of the alcohol they carried on board and if we had any expenses while out on the trail (a packed lunch was provided from the barge).
Both barges ply their trade on The Caledonian Canal between Inverness and Fort William, travelling in both directions, so you either join near Fort William or Inverness dependent on the direction of travel. They do walk along the Great Glen Way but that’s just one of the varied trips they do - a look on their website will give you full details of their itineraries and will advise on the state of bookings - be warned, their trips are really popular and book up really quickly and well in advance of sailing date.
We had a great time on Fingal walking the GGW and I thoroughly recommend one of their trips.
Ian