I run my carb dry if I'm not planning on using in within a week. I have occasionally forgotten to do so when distracted, and it has been fine over three outboards and 25 years that way. Plus, the garage flushes usually take care of that in the fall anyway. I think new gasolines are much more stable, and less prone to varnishing.
Unless I've run the carb dry, or switching tanks, I never touch the bulb. No need to.