When to change fluids

[tdjaster]

I know all of the recommended service intervals but I'm going back and forth on one thing...

I'm at the amount of hours where I need to change tranny fluid and oil but I'm also about to put the boat away for the next few months (note: I keep it in my garage in San Antonio so I don't fully winterize...no need for it).

Should I change the fluids before storing it or right away when I get it back out for the spring?

Thanks!