I have used a hitch ball cover in the past but always ended up losing it when the boat was hooked up. I got a little nylon pouch made to hold golf t's with a clip on it. Now when I hook up to go fishing, I place my hitch cover in a heavy sandwich baggie and put it in the golf t pouch. Then I clip it to the tie down inside the bed of my F150. Now the cover is always there, it wont get grease all over my interior and it wont fly out of the bed while tooling down the highway.