This may be the smallest type of cruise possible. Luxury travel company Belmond is building another mini-river cruise ship. This one will sail just 6 guests through the legendary Champagne region of France.  Part of its French collection, Coquelicot, A Belmond Boat, Champagne, launches in spring of 2023. It joins a fleet of so-called ‘barges’ in France called Les Bateaux Belmond. The fleet includes intimate vessels sailing in France’s Du Midi, the Camargue, Provence, two in Burgundy, and one in...