I think the Maxx-Air will help a lot. It is a pretty easy install. Once in place open the vent wide open and just leave it that way. As for installing a fan - I considered that but for now we just picked up one of these:
https://www.amazon.com/gp/product/B00...=sr_1_4&sr=8-4
Will plug into the 12v socket on the wall and is more flexible than a vent fan since you can position for best air flow. It's pretty quiet too and since it's 12v you can use it without shore power.