Jan 11, 2010  · What is the best river cruise line for. Neither Vantage nor Grand Circle deal with travel. My father and took a Uniworld cruise, Budapest to Amsterdam… AMSTERDAM — Vantage Deluxe World Travel named the 176-passenger River Discovery II here in mid-March, a river vessel that caters to solo travelers with single cabins, an option absent from most of the newer river cruise ships. The. While aboard, you…