I fish for smallies and lm from a yak in rivers, streams and lakes. The biggest 'hook' I throw is a size 4. I have several rods in my trunk. An 8.5' 5 wt with 6 wt line and a 9' 4 wt with 4 wt line. I am not trying to cast a great distance because I can usually position the yak to make the cast reasonable. But I am managing elements such as trees, bushes, current, wind, boat movement so it can be interesting. I have a 9' 6 wt that I keep at a lake cottage and also use from a yak.