If you take the makeover in the fall, you will not have to do two things in the spring. Wash the boat and put on antifouling. The benefits of doing a decent job in the fall are many. Perhaps the most important thing is that you greatly facilitate the spring break and that the boat is better protected throughout the winter. The longer the dirt gets to sit, the worse it is of course to get it off.
When picking up the boat after the season, it is important to clean the cooling system for salt and algae. This is to prevent corrosion damage. Before winter it is also important to glycol protect the cooling system to prevent frostbite.
Read more on the links below.
Spring / Autumn cleaning kit can be found here