A/C on the cheap
I've seen the window units used before and altho a little cumbersome, they actually do pretty well in cooling down boats.I might go that route before I'd use the ice and fan, an apparent version of the still-used "swamp cooler" method. A/C's cool the air by removing moisture, ergo, the need for a condensation drain. Swamp coolers add that moisture back and you can wind up being pretty clammy before it's over.