Don't know Slovenia, passed through, camped one night on route to Croatia.
Re Missus. Bad crash (solo) Dundee hospital 11 days, shipped home for 3 years phyisio, missus upset & with our riding friends being killed a few years earlier. She's ok with me touring with me chums.
Never tried bikeshuttle, I go Hull/Zeebrugge overnight ferry. M'way stint through Belguim, gets me the 360 miles down into the Vosges for teatime, decide from there. Went Hull/Rotterdam for Prague. The Verdon Gorge is worth couple days if you're riding route Napoleon, ride the outer & inner rings of the gorge, see the Vultures rising on the thermals.
Great to hear your travels, inspiring me with enthusiasm to get off me ass more this year.