Charles and I stayed at the Hotel Le Canberra in Cannes for several nights not too long ago, and I must say, it was the perfect little gem of a hotel. It was the end of September, which is the best time to travel to the Riviera—rates go down because it’s past the peak tourist season; the weather is ideal (warm days and cool nights); and the streets and beaches are free of all the hubbub that inundates the region…