Questions about running generator in back of truck

Back when I owned a Honda EU2000i I first ran it while camping with the genset in the back of my Avalanche with the tailgate open but the cargo lids in place. That protected it from any rain (which is important) but it sure got hot running in there so I shifted the genset forward and placed a 10" fan in front of the genset ... one of the genset's outlets powered the trailer, the other was used to power the fan. This solved the overheating issue entirely and any exhaust was blown out the open tailgate.