[5.0 Junkie]

Getting 8mpg. Trailer weighs 7500# or so. It pulls very hard. It has 7' ceilings so is a bit tall. Top 3' is always splattered with bugs. I'm thinking put a topper on the truck. I have a soft tonneau now. I was also thinking about putting one of the adjustable wings on top of the topper at the very back. I'd really like a flexible sleeve that would connect the truck/topper to the trailer like a big sock. Not feasible now. I pull the trailer 2500 miles or so a month on average.

Looking at putting side skirts and moons on the trailer as the tires are tucked in the fenders. Diverters in front of the trailer tires?

On the truck, looking to block the grille. It is a diesel and getting cold, so it won't hurt to have it blocked off. What other easy things can I do to help out. Been reading a lot, but not sure where to start.