I have always used external storage for those items that are used outside, or are dirty, when the camper is not in motion and need to be stored when it is being towed. WD bars, since they are installed when the camper is being towed don't rate special storage, in my book. And since the trunnions should not be greased (only a few drops of thick oil), I simply place a zip lock bag over the end of each bar and put them in the pass through storage. The hitch gets left in the tongue (hanging by the ball and spun around backwards) and the release locked. The anti sway cams and chains are permanently mounted.
2014 Coachmen Catalina 253RKS
2016 Summerland Mini 1750 RD
2012 F250 Lariat FX4 Crew Cab 6.2L