I've been working out ways to stay reasonably comfortable in a van without cutting holes in the sheet metal to accommodate an AC. I'm familiar with down-and-dirty survival techniques such as reflective window panels, fans+mister bottles, parking in shade etc. I'll most likely be snowbirding, sort of, by spending winters somewhere around Houston and roaming around New Mexico (at various altitudes) the rest of the year. It occurred to me that a portable swamp cooler might offer a little extra comfort in the desert environment, but then I got to thinking about how much moisture they add to the air. Would it pose a rust and/or mold hazard? Would I want to use desiccants to collect the airborne moisture?