it sounds to me like you've got things pretty well covered. I'm assuming the hand tools include a #2 Robertson screwdriver, without which it is nearly impossible to fix anything on an RV.
If you don't have a set of warning triangles, they would be a great thing to carry along should you need to stop alongside the road for whatever emergency; likewise a high-visibility vest. (In dry areas of the west, the triangles are much preferred to flares in as much as triangles aren't known to start wildfires accidentally.)