Your Inflatable boat can travel by oars, but if you got a long ways to travel, consider an inflatable boat motor which can be equipped as an outboard.  An inflatable boat can handle different horsepower sizes up to 3 horsepower.  The inflatable boat motor is designed for efficiency and low turbulence so you’re minimizing the disturbance of the wildlife and the area you may be fishing at. 

The inflatable boat motor is designed to be fuel efficient so you aren’t going to pay a lot for fillips and it can travel a large distance on a tank of gas.  The different propellers for the motor are numerous and provide different characteristics.  Inflatable boat motor blades can be replaced if they are damaged easily.  The differences range from low turbulence and low speed to high speed with high turbulence. 

The horsepower of your inflatable boat motor is just dependant on what you wish to pay for and what the function you want.  Not only are they gas powered but also electric powered too so you will have no need to pay the extra for the gas.  Just install a marine battery to the engine and off the fishing spot.