I see the point of getting the zerks greased, marine grease is the one you want, but doing the inspection like Bondo said isn't an option in the fall. Unless you are in the Southern Hemisphere its gotta be done before launching if you want to have a worry free time on the water, which will make it more enjoyable. In my opinion.
And if you notice any issues in the fall you can deal with them before spring launch.If you do it in the fall then it's all ready for spring.