Where does bilge water come from?
I''ve stored with mast up and down and note that a lot more water accumulates in the bilge with the mast up. I think that''s the major source.
If you stay aboard your boat during a significant rainstorm you should be able to see where the water is coming from. It takes more than a drizzle and 20-30 minutes before all of the leaks become apparent.
I also have to be careful in November and December (Boston area). If I don''t pump out the bilge before temperatures drop below freezing, I end up with a skating rink below and no way to pump it out until it thaws in April. That happened this past year and I needed to strip and revarnish the cabin sole.