Yangtze is very long, which section will you be? You can rent a boat in some indangerous section for fishing or sightseeing. But if you want to see the essence of Yangtze, cruise on a bigger ship is better, just my personal idea. Here is Yangtze Three Gorges Exploration(https://www.travelchinaguide.com/cruise/regal/tour-yr01b.htm) for your reference only.